diff --git a/README.md b/README.md
index a133ff3b1..b969293c4 100644
--- a/README.md
+++ b/README.md
@@ -44,14 +44,14 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.30.0</version>
+    <version>0.31.0</version>
   </dependency>
 </dependencies>
 ```
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.30.0'
+compile 'io.opencensus:opencensus-api:0.31.0'
 ```
 
 ### Hello "OpenCensus" trace events
@@ -194,12 +194,12 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.30.0</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-impl</artifactId>
-    <version>0.30.0</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -207,8 +207,8 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.30.0'
-runtime 'io.opencensus:opencensus-impl:0.30.0'
+compile 'io.opencensus:opencensus-api:0.31.0'
+runtime 'io.opencensus:opencensus-impl:0.31.0'
 ```
 
 ### How to setup exporters?
diff --git a/contrib/appengine_standard_util/README.md b/contrib/appengine_standard_util/README.md
index 004111d33..eff4b4a10 100644
--- a/contrib/appengine_standard_util/README.md
+++ b/contrib/appengine_standard_util/README.md
@@ -16,14 +16,14 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-appengine-standard-util</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
 </dependencies>
 ```
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-contrib-appengine-standard-util:0.28.3'
+compile 'io.opencensus:opencensus-contrib-appengine-standard-util:0.31.0'
 ```
 
 [travis-image]: https://travis-ci.org/census-instrumentation/opencensus-java.svg?branch=master
diff --git a/contrib/dropwizard/README.md b/contrib/dropwizard/README.md
index 6d6d55ddf..a69986076 100644
--- a/contrib/dropwizard/README.md
+++ b/contrib/dropwizard/README.md
@@ -18,14 +18,14 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-contrib-dropwizard</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
 </dependencies>
 ```
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-contrib-dropwizard:0.28.3'
+compile 'io.opencensus:opencensus-contrib-dropwizard:0.31.0'
 ```
 
 ### And the following code:
diff --git a/contrib/dropwizard5/README.md b/contrib/dropwizard5/README.md
index 28f88bddf..919841c38 100644
--- a/contrib/dropwizard5/README.md
+++ b/contrib/dropwizard5/README.md
@@ -18,14 +18,14 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-contrib-dropwizard5</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
 </dependencies>
 ```
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-contrib-dropwizard5:0.28.3'
+compile 'io.opencensus:opencensus-contrib-dropwizard5:0.31.0'
 ```
 
 ### And the following code:
diff --git a/contrib/exemplar_util/README.md b/contrib/exemplar_util/README.md
index 34231239e..f44ae8662 100644
--- a/contrib/exemplar_util/README.md
+++ b/contrib/exemplar_util/README.md
@@ -17,14 +17,14 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-contrib-exemplar-util</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
 </dependencies>
 ```
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-contrib-exemplar-util:0.28.3'
+compile 'io.opencensus:opencensus-contrib-exemplar-util:0.31.0'
 ```
 
 [travis-image]: https://travis-ci.org/census-instrumentation/opencensus-java.svg?branch=master
diff --git a/contrib/grpc_util/README.md b/contrib/grpc_util/README.md
index 235d8990a..aeb538dbb 100644
--- a/contrib/grpc_util/README.md
+++ b/contrib/grpc_util/README.md
@@ -16,14 +16,14 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-contrib-grpc-util</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
 </dependencies>
 ```
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-contrib-grpc-util:0.28.3'
+compile 'io.opencensus:opencensus-contrib-grpc-util:0.31.0'
 ```
 
 [travis-image]: https://travis-ci.org/census-instrumentation/opencensus-java.svg?branch=master
diff --git a/contrib/http_jaxrs/README.md b/contrib/http_jaxrs/README.md
index 07aa74d2b..acd91f40f 100644
--- a/contrib/http_jaxrs/README.md
+++ b/contrib/http_jaxrs/README.md
@@ -15,20 +15,20 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-contrib-http-jaxrs</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
 </dependencies>
 ```
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-contrib-http-jaxrs:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-contrib-http-jaxrs:0.31.0'
 ```
 
 ### Usage
diff --git a/contrib/http_jetty_client/README.md b/contrib/http_jetty_client/README.md
index da0ea70cd..00dad1e63 100644
--- a/contrib/http_jetty_client/README.md
+++ b/contrib/http_jetty_client/README.md
@@ -15,20 +15,20 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-contrib-http-jetty-client</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
 </dependencies>
 ```
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-contrib-http-jetty-client:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-contrib-http-jetty-client:0.31.0'
 ```
 
 ## Instrumenting Jetty Http Client
diff --git a/contrib/http_servlet/README.md b/contrib/http_servlet/README.md
index 953730e3d..49481f545 100644
--- a/contrib/http_servlet/README.md
+++ b/contrib/http_servlet/README.md
@@ -15,20 +15,20 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-contrib-http-servlet</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
 </dependencies>
 ```
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-contrib-http-servlet:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-contrib-http-servlet:0.31.0'
 ```
 
 ## Instrumenting HTTP Servlets
diff --git a/contrib/http_util/README.md b/contrib/http_util/README.md
index b13915f77..5949cee21 100644
--- a/contrib/http_util/README.md
+++ b/contrib/http_util/README.md
@@ -16,20 +16,20 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-contrib-http-util</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
 </dependencies>
 ```
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-contrib-http-util:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-contrib-http-util:0.31.0'
 ```
 
 ## Instrumenting HTTP libraries/frameworks
diff --git a/contrib/log_correlation/log4j2/README.md b/contrib/log_correlation/log4j2/README.md
index ec980028b..238cdce99 100644
--- a/contrib/log_correlation/log4j2/README.md
+++ b/contrib/log_correlation/log4j2/README.md
@@ -36,7 +36,7 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-contrib-log-correlation-log4j2</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -44,7 +44,7 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-runtime 'io.opencensus:opencensus-contrib-log-correlation-log4j2:0.28.3'
+runtime 'io.opencensus:opencensus-contrib-log-correlation-log4j2:0.31.0'
 ```
 
 ### Configure the `OpenCensusTraceContextDataInjector`
diff --git a/contrib/log_correlation/stackdriver/README.md b/contrib/log_correlation/stackdriver/README.md
index 17636f7e0..eeb406c5c 100644
--- a/contrib/log_correlation/stackdriver/README.md
+++ b/contrib/log_correlation/stackdriver/README.md
@@ -29,7 +29,7 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-contrib-log-correlation-stackdriver</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -37,7 +37,7 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-runtime 'io.opencensus:opencensus-contrib-log-correlation-stackdriver:0.28.3'
+runtime 'io.opencensus:opencensus-contrib-log-correlation-stackdriver:0.31.0'
 ```
 
 ### Configure the `OpenCensusTraceLoggingEnhancer`
diff --git a/contrib/spring/README.md b/contrib/spring/README.md
index 7a7a59edd..ed2440589 100644
--- a/contrib/spring/README.md
+++ b/contrib/spring/README.md
@@ -18,17 +18,17 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-contrib-spring</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-impl</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
   
@@ -45,9 +45,9 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-contrib-spring:0.28.3'
-runtime 'io.opencensus:opencensus-impl:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-contrib-spring:0.31.0'
+runtime 'io.opencensus:opencensus-impl:0.31.0'
 runtime 'org.springframework:spring-aspects:SPRING_VERSION'
 ```
 
diff --git a/contrib/spring_sleuth_v1x/README.md b/contrib/spring_sleuth_v1x/README.md
index a54eb1f8f..85a1831e5 100644
--- a/contrib/spring_sleuth_v1x/README.md
+++ b/contrib/spring_sleuth_v1x/README.md
@@ -22,7 +22,7 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-contrib-spring-sleuth</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <exclusions>
       <exclusion>
 	    <groupId>org.springframework.cloud</groupId>
@@ -39,7 +39,7 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-contrib-spring-sleuth:0.28.3'
+compile 'io.opencensus:opencensus-contrib-spring-sleuth:0.31.0'
 ```
 
 [travis-image]: https://travis-ci.org/census-instrumentation/opencensus-java.svg?branch=master
diff --git a/contrib/zpages/README.md b/contrib/zpages/README.md
index c7895ee21..a462ef46b 100644
--- a/contrib/zpages/README.md
+++ b/contrib/zpages/README.md
@@ -16,17 +16,17 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-contrib-zpages</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-impl</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -34,9 +34,9 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-contrib-zpages:0.28.3'
-runtime 'io.opencensus:opencensus-impl:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-contrib-zpages:0.31.0'
+runtime 'io.opencensus:opencensus-impl:0.31.0'
 ```
 
 ### Register the Z-Pages
diff --git a/examples/build.gradle b/examples/build.gradle
index ac437cfc8..d3f39c89f 100644
--- a/examples/build.gradle
+++ b/examples/build.gradle
@@ -33,7 +33,7 @@ repositories {
 group = "io.opencensus"
 version = "0.32.0-SNAPSHOT" // CURRENT_OPENCENSUS_VERSION
 
-def opencensusVersion = "0.30.0" // LATEST_OPENCENSUS_RELEASE_VERSION
+def opencensusVersion = "0.31.0" // LATEST_OPENCENSUS_RELEASE_VERSION
 def grpcVersion = "1.32.2" // CURRENT_GRPC_VERSION
 def prometheusVersion = "0.6.0"
 def jettyVersion = "9.4.17.v20190418"
diff --git a/examples/pom.xml b/examples/pom.xml
index e12e8e3ba..cd4031257 100644
--- a/examples/pom.xml
+++ b/examples/pom.xml
@@ -12,7 +12,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <!-- change to the version you want to use. -->
     <jetty.version>9.4.41.v20210516</jetty.version>
-    <opencensus.version>0.28.3</opencensus.version> <!-- LATEST_OPENCENSUS_RELEASE_VERSION -->
+    <opencensus.version>0.31.0</opencensus.version> <!-- LATEST_OPENCENSUS_RELEASE_VERSION -->
     <grpc.version>1.32.2</grpc.version> <!-- CURRENT_GRPC_VERSION -->
   </properties>
   <dependencies>
diff --git a/exporters/stats/prometheus/README.md b/exporters/stats/prometheus/README.md
index 7e8566d31..42dc010e5 100644
--- a/exporters/stats/prometheus/README.md
+++ b/exporters/stats/prometheus/README.md
@@ -21,17 +21,17 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-exporter-stats-prometheus</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-impl</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -39,9 +39,9 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-exporter-stats-prometheus:0.28.3'
-runtime 'io.opencensus:opencensus-impl:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-exporter-stats-prometheus:0.31.0'
+runtime 'io.opencensus:opencensus-impl:0.31.0'
 ```
 
 #### Register the exporter
diff --git a/exporters/stats/signalfx/README.md b/exporters/stats/signalfx/README.md
index d2acb80d5..4d425ceee 100644
--- a/exporters/stats/signalfx/README.md
+++ b/exporters/stats/signalfx/README.md
@@ -27,17 +27,17 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-exporter-stats-signalfx</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-impl</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -46,9 +46,9 @@ For Maven add to your `pom.xml`:
 For Gradle add to your dependencies:
 
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-exporter-stats-signalfx:0.28.3'
-runtime 'io.opencensus:opencensus-impl:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-exporter-stats-signalfx:0.31.0'
+runtime 'io.opencensus:opencensus-impl:0.31.0'
 ```
 
 ### Register the exporter
diff --git a/exporters/stats/stackdriver/README.md b/exporters/stats/stackdriver/README.md
index 94585315a..517234304 100644
--- a/exporters/stats/stackdriver/README.md
+++ b/exporters/stats/stackdriver/README.md
@@ -30,17 +30,17 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-exporter-stats-stackdriver</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-impl</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -48,9 +48,9 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-exporter-stats-stackdriver:0.28.3'
-runtime 'io.opencensus:opencensus-impl:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-exporter-stats-stackdriver:0.31.0'
+runtime 'io.opencensus:opencensus-impl:0.31.0'
 ```
 
 #### Register the exporter
diff --git a/exporters/trace/datadog/README.md b/exporters/trace/datadog/README.md
index b8948651f..34f947cbe 100644
--- a/exporters/trace/datadog/README.md
+++ b/exporters/trace/datadog/README.md
@@ -21,17 +21,17 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-exporter-trace-datadog</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-impl</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -39,9 +39,9 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-exporter-trace-datadog:0.28.3'
-runtime 'io.opencensus:opencensus-impl:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-exporter-trace-datadog:0.31.0'
+runtime 'io.opencensus:opencensus-impl:0.31.0'
 ```
 
 #### Register the exporter
diff --git a/exporters/trace/elasticsearch/README.md b/exporters/trace/elasticsearch/README.md
index ea81fcceb..1e63c9337 100644
--- a/exporters/trace/elasticsearch/README.md
+++ b/exporters/trace/elasticsearch/README.md
@@ -26,17 +26,17 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-exporter-trace-elasticsearch</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-impl</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -45,9 +45,9 @@ For Maven add to your `pom.xml`:
 For Gradle add to your dependencies:
 
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-exporter-trace-elasticsearch:0.28.3'
-runtime 'io.opencensus:opencensus-impl:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-exporter-trace-elasticsearch:0.31.0'
+runtime 'io.opencensus:opencensus-impl:0.31.0'
 ```
 
 #### Register the exporter
diff --git a/exporters/trace/instana/README.md b/exporters/trace/instana/README.md
index ce5077d5a..724eecf7c 100644
--- a/exporters/trace/instana/README.md
+++ b/exporters/trace/instana/README.md
@@ -27,17 +27,17 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-exporter-trace-instana</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-impl</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -45,9 +45,9 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-exporter-trace-instana:0.28.3'
-runtime 'io.opencensus:opencensus-impl:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-exporter-trace-instana:0.31.0'
+runtime 'io.opencensus:opencensus-impl:0.31.0'
 ```
 
 #### Register the exporter
diff --git a/exporters/trace/jaeger/README.md b/exporters/trace/jaeger/README.md
index b72d97b68..050dca5d9 100644
--- a/exporters/trace/jaeger/README.md
+++ b/exporters/trace/jaeger/README.md
@@ -40,17 +40,17 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-exporter-trace-jaeger</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-impl</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -58,9 +58,9 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-exporter-trace-jaeger:0.28.3'
-runtime 'io.opencensus:opencensus-impl:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-exporter-trace-jaeger:0.31.0'
+runtime 'io.opencensus:opencensus-impl:0.31.0'
 ```
 
 #### Register the exporter
diff --git a/exporters/trace/logging/README.md b/exporters/trace/logging/README.md
index d5b162c34..2f2543b7a 100644
--- a/exporters/trace/logging/README.md
+++ b/exporters/trace/logging/README.md
@@ -15,17 +15,17 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-exporter-trace-logging</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-impl</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -33,9 +33,9 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-exporter-trace-logging:0.28.3'
-runtime 'io.opencensus:opencensus-impl:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-exporter-trace-logging:0.31.0'
+runtime 'io.opencensus:opencensus-impl:0.31.0'
 ```
 
 ### Register the exporter
diff --git a/exporters/trace/ocagent/README.md b/exporters/trace/ocagent/README.md
index 49cd69894..ae53e03b6 100644
--- a/exporters/trace/ocagent/README.md
+++ b/exporters/trace/ocagent/README.md
@@ -13,23 +13,23 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-exporter-trace-ocagent</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-impl</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
   <dependency>
     <groupId>io.netty</groupId>
     <artifactId>netty-tcnative-boringssl-static</artifactId>
-    <version>0.28.3.Final</version>
+    <version>0.31.0.Final</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -37,9 +37,9 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-exporter-trace-ocagent:0.28.3'
-runtime 'io.opencensus:opencensus-impl:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-exporter-trace-ocagent:0.31.0'
+runtime 'io.opencensus:opencensus-impl:0.31.0'
 runtime 'io.netty:netty-tcnative-boringssl-static:2.0.20.Final'
 ```
 
diff --git a/exporters/trace/stackdriver/README.md b/exporters/trace/stackdriver/README.md
index 0af5f06ca..6b4c95054 100644
--- a/exporters/trace/stackdriver/README.md
+++ b/exporters/trace/stackdriver/README.md
@@ -34,17 +34,17 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-exporter-trace-stackdriver</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-impl</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -52,9 +52,9 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-exporter-trace-stackdriver:0.28.3'
-runtime 'io.opencensus:opencensus-impl:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-exporter-trace-stackdriver:0.31.0'
+runtime 'io.opencensus:opencensus-impl:0.31.0'
 ```
 
 #### Register the exporter
diff --git a/exporters/trace/zipkin/README.md b/exporters/trace/zipkin/README.md
index 69a37ba8b..ce963c2f5 100644
--- a/exporters/trace/zipkin/README.md
+++ b/exporters/trace/zipkin/README.md
@@ -33,17 +33,17 @@ For Maven add to your `pom.xml`:
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-api</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-exporter-trace-zipkin</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
   </dependency>
   <dependency>
     <groupId>io.opencensus</groupId>
     <artifactId>opencensus-impl</artifactId>
-    <version>0.28.3</version>
+    <version>0.31.0</version>
     <scope>runtime</scope>
   </dependency>
 </dependencies>
@@ -51,9 +51,9 @@ For Maven add to your `pom.xml`:
 
 For Gradle add to your dependencies:
 ```groovy
-compile 'io.opencensus:opencensus-api:0.28.3'
-compile 'io.opencensus:opencensus-exporter-trace-zipkin:0.28.3'
-runtime 'io.opencensus:opencensus-impl:0.28.3'
+compile 'io.opencensus:opencensus-api:0.31.0'
+compile 'io.opencensus:opencensus-exporter-trace-zipkin:0.31.0'
+runtime 'io.opencensus:opencensus-impl:0.31.0'
 ```
 
 #### Register the exporter