diff --git a/CHANGELOG.md b/CHANGELOG.md
index fe73d3c7a..2bf3cda58 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # Changelog
 
+## [1.15.21](https://github.com/googleapis/java-pubsublite/compare/v1.15.20...v1.15.21) (2026-01-19)
+
+
+### Dependencies
+
+* Update dependency com.google.cloud:google-cloud-pubsub to v1.145.0 ([#1956](https://github.com/googleapis/java-pubsublite/issues/1956)) ([62f81d6](https://github.com/googleapis/java-pubsublite/commit/62f81d69393248c051feed7e0c5c4350d0653cab))
+* Update dependency com.google.cloud:sdk-platform-java-config to v3.55.1 ([#1960](https://github.com/googleapis/java-pubsublite/issues/1960)) ([bf6f24b](https://github.com/googleapis/java-pubsublite/commit/bf6f24beb56dcf948492cae1699d285ccd8a980f))
+* Update googleapis/sdk-platform-java action to v2.65.1 ([#1959](https://github.com/googleapis/java-pubsublite/issues/1959)) ([87e737f](https://github.com/googleapis/java-pubsublite/commit/87e737f0ffb163cae44b05838ccc2671e697ccf2))
+
 ## [1.15.20](https://github.com/googleapis/java-pubsublite/compare/v1.15.19...v1.15.20) (2025-12-12)
 
 
diff --git a/README.md b/README.md
index 73f9f0554..7fb95b918 100644
--- a/README.md
+++ b/README.md
@@ -32,13 +32,13 @@ If you are using Maven, add this to your pom.xml file:
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-pubsublite:1.15.20'
+implementation 'com.google.cloud:google-cloud-pubsublite:1.15.21'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-pubsublite" % "1.15.20"
+libraryDependencies += "com.google.cloud" % "google-cloud-pubsublite" % "1.15.21"
 ```
 
 ## Authentication
@@ -481,7 +481,7 @@ Java is a registered trademark of Oracle and/or its affiliates.
 [kokoro-badge-link-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-pubsublite/java11.html
 [stability-image]: https://img.shields.io/badge/stability-stable-green
 [maven-version-image]: https://img.shields.io/maven-central/v/com.google.cloud/google-cloud-pubsublite.svg
-[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-pubsublite/1.15.20
+[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-pubsublite/1.15.21
 [authentication]: https://github.com/googleapis/google-cloud-java#authentication
 [auth-scopes]: https://developers.google.com/identity/protocols/oauth2/scopes
 [predefined-iam-roles]: https://cloud.google.com/iam/docs/understanding-roles#predefined_roles
diff --git a/google-cloud-pubsublite-bom/pom.xml b/google-cloud-pubsublite-bom/pom.xml
index cc589ab47..db26f3ac8 100644
--- a/google-cloud-pubsublite-bom/pom.xml
+++ b/google-cloud-pubsublite-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-pubsublite-bom</artifactId>
-  <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+  <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.cloud</groupId>
@@ -52,17 +52,17 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-pubsublite</artifactId>
-        <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+        <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-pubsublite-v1</artifactId>
-        <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-pubsublite-v1:current} -->
+        <version>1.15.21</version><!-- {x-version-update:grpc-google-cloud-pubsublite-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-pubsublite-v1</artifactId>
-        <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-pubsublite-v1:current} -->
+        <version>1.15.21</version><!-- {x-version-update:proto-google-cloud-pubsublite-v1:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-cloud-pubsublite/pom.xml b/google-cloud-pubsublite/pom.xml
index abf050ef8..a4289cc93 100644
--- a/google-cloud-pubsublite/pom.xml
+++ b/google-cloud-pubsublite/pom.xml
@@ -3,13 +3,13 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-pubsublite-parent</artifactId>
-    <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+    <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-pubsublite</artifactId>
-  <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+  <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud Pub/Sub Lite</name>
   <url>https://github.com/googleapis/java-pubsublite</url>
@@ -48,12 +48,12 @@
     <dependency>
       <groupId>com.google.api.grpc</groupId>
       <artifactId>proto-google-cloud-pubsublite-v1</artifactId>
-      <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+      <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
     </dependency>
     <dependency>
       <groupId>com.google.api.grpc</groupId>
       <artifactId>grpc-google-cloud-pubsublite-v1</artifactId>
-      <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+      <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
     </dependency>
     <dependency>
       <groupId>com.google.flogger</groupId>
diff --git a/grpc-google-cloud-pubsublite-v1/pom.xml b/grpc-google-cloud-pubsublite-v1/pom.xml
index 5c46121e0..bb8a2337e 100644
--- a/grpc-google-cloud-pubsublite-v1/pom.xml
+++ b/grpc-google-cloud-pubsublite-v1/pom.xml
@@ -4,20 +4,20 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-pubsublite-v1</artifactId>
-  <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+  <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
   <name>grpc-google-cloud-pubsublite-v1</name>
   <description>GRPC library for grpc-google-cloud-pubsublite-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-pubsublite-parent</artifactId>
-    <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+    <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <dependencies>
     <dependency>
       <groupId>com.google.api.grpc</groupId>
       <artifactId>proto-google-cloud-pubsublite-v1</artifactId>
-      <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+      <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
     </dependency>
     <dependency>
       <groupId>io.grpc</groupId>
diff --git a/pom.xml b/pom.xml
index 50ee84ed5..35c184fbe 100644
--- a/pom.xml
+++ b/pom.xml
@@ -8,7 +8,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-pubsublite-parent</artifactId>
-  <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+  <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
   <packaging>pom</packaging>
   <name>Google Cloud Pub/Sub Lite Parent</name>
   <url>https://github.com/googleapis/java-pubsublite</url>
@@ -25,17 +25,17 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-pubsublite-v1</artifactId>
-        <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+        <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-pubsublite-v1</artifactId>
-        <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+        <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-pubsublite</artifactId>
-        <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+        <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.auto.service</groupId>
diff --git a/proto-google-cloud-pubsublite-v1/pom.xml b/proto-google-cloud-pubsublite-v1/pom.xml
index 631c9e02e..0b148a180 100644
--- a/proto-google-cloud-pubsublite-v1/pom.xml
+++ b/proto-google-cloud-pubsublite-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-pubsublite-v1</artifactId>
-  <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+  <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
   <name>proto-google-cloud-pubsublite-v1</name>
   <description>PROTO library for proto-google-cloud-pubsublite-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-pubsublite-parent</artifactId>
-    <version>1.15.21-SNAPSHOT</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
+    <version>1.15.21</version><!-- {x-version-update:google-cloud-pubsublite:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <dependencies>
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
index 1269321ef..2b48e64b2 100644
--- a/samples/snapshot/pom.xml
+++ b/samples/snapshot/pom.xml
@@ -45,7 +45,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-pubsublite</artifactId>
-      <version>1.15.21-SNAPSHOT</version>
+      <version>1.15.21</version>
     </dependency>
     <!-- {x-version-update-end} -->
     <dependency>
diff --git a/versions.txt b/versions.txt
index 1f0e4286d..714222588 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,7 +1,7 @@
 # Format:
 # module:released-version:current-version
 
-google-cloud-pubsublite:1.15.20:1.15.21-SNAPSHOT
-pubsublite-beam-io:0.34.20:0.34.21-SNAPSHOT
-proto-google-cloud-pubsublite-v1:1.15.20:1.15.21-SNAPSHOT
-grpc-google-cloud-pubsublite-v1:1.15.20:1.15.21-SNAPSHOT
+google-cloud-pubsublite:1.15.21:1.15.21
+pubsublite-beam-io:0.34.21:0.34.21
+proto-google-cloud-pubsublite-v1:1.15.21:1.15.21
+grpc-google-cloud-pubsublite-v1:1.15.21:1.15.21