diff --git a/.github/.OwlBot.lock.yaml b/.github/.OwlBot.lock.yaml
index f930d4846..d304652e1 100644
--- a/.github/.OwlBot.lock.yaml
+++ b/.github/.OwlBot.lock.yaml
@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-java:latest
-  digest: sha256:bc2bf47c7370f1b1a8a46b0c104ce7e43644ac58902c9de265fe1f253fcc2506
-# created: 2023-10-31T13:44:21.909247346Z
+  digest: sha256:6f431774e11cc46619cf093fd1481193c4024031073697fa18f0099b943aab88
+# created: 2023-12-01T19:50:20.444857406Z
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index e27b2c575..ae66b1973 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -25,7 +25,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java: [11, 17]
+        java: [11, 17, 21]
     steps:
     - uses: actions/checkout@v3
     - uses: actions/setup-java@v3
diff --git a/README.md b/README.md
index c30e951f6..4f2ac8fb4 100644
--- a/README.md
+++ b/README.md
@@ -33,13 +33,13 @@ 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:1.12.18'
+implementation 'com.google.cloud:google-cloud-pubsublite:1.12.19'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-pubsublite" % "1.12.18"
+libraryDependencies += "com.google.cloud" % "google-cloud-pubsublite" % "1.12.19"
 ```
 <!-- {x-version-update-end} -->
 
@@ -483,7 +483,7 @@ 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/1.12.18
+[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-pubsublite/1.12.19
 [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