diff --git a/.github/workflows/update_generation_config.yaml b/.github/workflows/update_generation_config.yaml
index 59e39834d..a7e14bb48 100644
--- a/.github/workflows/update_generation_config.yaml
+++ b/.github/workflows/update_generation_config.yaml
@@ -26,7 +26,7 @@ jobs:
       # the branch into which the pull request is merged
       base_branch: main
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
         token: ${{ secrets.CLOUD_JAVA_BOT_TOKEN }}
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
new file mode 100644
index 000000000..e273f3219
--- /dev/null
+++ b/.release-please-manifest.json
@@ -0,0 +1,3 @@
+{
+  ".": "1.143.1"
+}
diff --git a/README.md b/README.md
index b0672bc00..a503ceea7 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,7 @@ If you are using Maven without the BOM, add this to your dependencies:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-pubsub</artifactId>
-  <version>1.143.0</version>
+  <version>1.143.1</version>
 </dependency>
 
 ```
@@ -51,7 +51,7 @@ If you are using Maven without the BOM, add this to your dependencies:
 If you are using Gradle 5.x or later, add this to your dependencies:
 
 ```Groovy
-implementation platform('com.google.cloud:libraries-bom:26.71.0')
+implementation platform('com.google.cloud:libraries-bom:26.72.0')
 
 implementation 'com.google.cloud:google-cloud-pubsub'
 ```
diff --git a/generation_config.yaml b/generation_config.yaml
index 744688ac1..5963f47a7 100644
--- a/generation_config.yaml
+++ b/generation_config.yaml
@@ -1,6 +1,6 @@
 gapic_generator_version: 2.64.1
-googleapis_commitish: 5342712986262b93211b136eb4bd6fb79b3764af
-libraries_bom_version: 26.71.0
+googleapis_commitish: 4667f02b64f2259ef21249b026ced7bb4351c632
+libraries_bom_version: 26.72.0
 libraries:
   - api_shortname: pubsub
     name_pretty: Cloud Pub/Sub
diff --git a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/Subscriber.java b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/Subscriber.java
index ce9bc6f15..a2d4f3b38 100644
--- a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/Subscriber.java
+++ b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/Subscriber.java
@@ -144,7 +144,7 @@ public class Subscriber extends AbstractApiService implements SubscriberInterfac
   private final boolean maxDurationPerAckExtensionDefaultUsed;
   private final java.time.Duration minDurationPerAckExtension;
   private final boolean minDurationPerAckExtensionDefaultUsed;
-  private final long protocolVersion;
+  private final long protocolVersion = 1L;
 
   // The ExecutorProvider used to generate executors for processing messages.
   private final ExecutorProvider executorProvider;
@@ -183,7 +183,6 @@ private Subscriber(Builder builder) {
     maxDurationPerAckExtensionDefaultUsed = builder.maxDurationPerAckExtensionDefaultUsed;
     minDurationPerAckExtension = builder.minDurationPerAckExtension;
     minDurationPerAckExtensionDefaultUsed = builder.minDurationPerAckExtensionDefaultUsed;
-    protocolVersion = builder.protocolVersion;
 
     clock = builder.clock.isPresent() ? builder.clock.get() : CurrentMillisClock.getDefaultClock();
 
@@ -551,8 +550,6 @@ public static final class Builder {
     private boolean enableOpenTelemetryTracing = false;
     private OpenTelemetry openTelemetry = null;
 
-    private long protocolVersion = 0L;
-
     private SubscriberShutdownSettings subscriberShutdownSettings =
         SubscriberShutdownSettings.newBuilder().build();
 
@@ -776,12 +773,6 @@ Builder setClock(ApiClock clock) {
       return this;
     }
 
-    /** Gives the ability to override the protocol version */
-    public Builder setProtocolVersion(long protocolVersion) {
-      this.protocolVersion = protocolVersion;
-      return this;
-    }
-
     /**
      * OpenTelemetry will be enabled if setEnableOpenTelemetry is true and and instance of
      * OpenTelemetry has been provied. Warning: traces are subject to change. The name and
diff --git a/release-please-config.json b/release-please-config.json
new file mode 100644
index 000000000..c80f5319f
--- /dev/null
+++ b/release-please-config.json
@@ -0,0 +1,14 @@
+{
+  "release-type": "java-yoshi",
+  "prerelease-type": "rc1",
+  "versioning": "prerelease",
+  "separate-pull-requests": false,
+  "include-component-in-tag": false,
+  "group-pull-request-title-pattern": "chore(${branch}): release ${version}",
+  "prerelease": true,
+  "packages": {
+    ".": {
+      "extra-files": []
+    }
+  }
+}