diff --git a/google-cloud-spanner/pom.xml b/google-cloud-spanner/pom.xml
index 3b0c0a6116..4100bc3ab5 100644
--- a/google-cloud-spanner/pom.xml
+++ b/google-cloud-spanner/pom.xml
@@ -277,7 +277,7 @@
     <dependency>
       <groupId>com.google.api.grpc</groupId>
       <artifactId>proto-google-cloud-monitoring-v3</artifactId>
-      <version>3.77.0</version>
+      <version>3.78.0</version>
     </dependency>
     <dependency>
       <groupId>com.google.api.grpc</groupId>