diff --git a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/StreamingSubscriberConnection.java b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/StreamingSubscriberConnection.java
index 5c9f9e171..2ee077597 100644
--- a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/StreamingSubscriberConnection.java
+++ b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/StreamingSubscriberConnection.java
@@ -519,7 +519,7 @@ private void startServerMonitor() {
                 }
 
                 logger.log(
-                    Level.WARNING,
+                    Level.INFO,
                     "No response from server for {0} seconds since last ping. Closing stream.",
                     elapsedSincePing.getSeconds());
 
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 a2d4f3b38..37440ba40 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 = 1L;
+  private final long protocolVersion = 0L;
 
   // The ExecutorProvider used to generate executors for processing messages.
   private final ExecutorProvider executorProvider;