diff --git a/dependencyManagement/build.gradle.kts b/dependencyManagement/build.gradle.kts
index e185903fa..9c21cb623 100644
--- a/dependencyManagement/build.gradle.kts
+++ b/dependencyManagement/build.gradle.kts
@@ -35,7 +35,7 @@ val CORE_DEPENDENCIES = listOf(
   "com.google.errorprone:error_prone_annotations:${errorProneVersion}",
   "com.google.errorprone:error_prone_core:${errorProneVersion}",
   "io.github.netmikey.logunit:logunit-jul:2.0.0",
-  "io.opentelemetry.proto:opentelemetry-proto:1.3.2-alpha",
+  "io.opentelemetry.proto:opentelemetry-proto:1.4.0-alpha",
   // these two constraints can be removed once the opentelemetry-instrumentation-bom-alpha
   // is updated to contain the latest version of opentelemetry-semconv
   "io.opentelemetry.semconv:opentelemetry-semconv:${semConvVersion}",
diff --git a/disk-buffering/build.gradle.kts b/disk-buffering/build.gradle.kts
index f895972cd..db4e0cfc8 100644
--- a/disk-buffering/build.gradle.kts
+++ b/disk-buffering/build.gradle.kts
@@ -53,7 +53,7 @@ wire {
   java {}
 
   sourcePath {
-    srcJar("io.opentelemetry.proto:opentelemetry-proto:1.3.2-alpha")
+    srcJar("io.opentelemetry.proto:opentelemetry-proto:1.4.0-alpha")
   }
 
   root(
diff --git a/jmx-metrics/build.gradle.kts b/jmx-metrics/build.gradle.kts
index 677449ca3..89d09a522 100644
--- a/jmx-metrics/build.gradle.kts
+++ b/jmx-metrics/build.gradle.kts
@@ -58,7 +58,7 @@ testing {
       dependencies {
         implementation("com.linecorp.armeria:armeria-grpc")
         implementation("com.linecorp.armeria:armeria-junit5")
-        implementation("io.opentelemetry.proto:opentelemetry-proto:1.3.2-alpha")
+        implementation("io.opentelemetry.proto:opentelemetry-proto:1.4.0-alpha")
         implementation("org.testcontainers:junit-jupiter")
       }
     }
diff --git a/jmx-scraper/build.gradle.kts b/jmx-scraper/build.gradle.kts
index 54ad80113..61f33dfbe 100644
--- a/jmx-scraper/build.gradle.kts
+++ b/jmx-scraper/build.gradle.kts
@@ -37,7 +37,7 @@ testing {
         implementation("org.slf4j:slf4j-simple")
         implementation("com.linecorp.armeria:armeria-junit5")
         implementation("com.linecorp.armeria:armeria-grpc")
-        implementation("io.opentelemetry.proto:opentelemetry-proto:1.3.2-alpha")
+        implementation("io.opentelemetry.proto:opentelemetry-proto:1.4.0-alpha")
       }
     }
   }
diff --git a/kafka-exporter/build.gradle.kts b/kafka-exporter/build.gradle.kts
index 09ce20971..7a055ebcd 100644
--- a/kafka-exporter/build.gradle.kts
+++ b/kafka-exporter/build.gradle.kts
@@ -9,7 +9,7 @@ otelJava.moduleName.set("io.opentelemetry.contrib.kafka")
 dependencies {
   api("io.opentelemetry:opentelemetry-sdk-trace")
   api("io.opentelemetry:opentelemetry-sdk-common")
-  api("io.opentelemetry.proto:opentelemetry-proto:1.3.2-alpha")
+  api("io.opentelemetry.proto:opentelemetry-proto:1.4.0-alpha")
   api("org.apache.kafka:kafka-clients")
 
   compileOnly("io.opentelemetry:opentelemetry-sdk-extension-autoconfigure")