diff --git a/.kokoro/build.sh b/.kokoro/build.sh
index c16aa11c6..6a12b3668 100755
--- a/.kokoro/build.sh
+++ b/.kokoro/build.sh
@@ -67,6 +67,7 @@ javadoc)
 integration)
     mvn -B ${INTEGRATION_TEST_ARGS} \
       -ntp \
+      -Dprotobuf.version=4.31.0 \
       -Penable-integration-tests \
       -DtrimStackTrace=false \
       -Dclirr.skip=true \
diff --git a/README.md b/README.md
index 87d663917..c5604d280 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file:
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>libraries-bom</artifactId>
-      <version>26.60.0</version>
+      <version>26.61.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>