diff --git a/.kokoro/build.sh b/.kokoro/build.sh
index 0656ab0e42..4a0e8c9bc4 100755
--- a/.kokoro/build.sh
+++ b/.kokoro/build.sh
@@ -92,6 +92,7 @@ javadoc)
 integration)
     mvn -B ${INTEGRATION_TEST_ARGS} \
       -ntp \
+      -Dprotobuf.version=4.29.4 \
       -Penable-integration-tests \
       -Djava.net.preferIPv4Stack=true \
       -DtrimStackTrace=false \