diff --git a/.kokoro/build.sh b/.kokoro/build.sh
index 3fa75a47d7..c88ac7ba37 100755
--- a/.kokoro/build.sh
+++ b/.kokoro/build.sh
@@ -69,6 +69,7 @@ javadoc)
 integration)
     mvn -B ${INTEGRATION_TEST_ARGS} \
       -ntp \
+      -Dprotobuf.version=4.29.4 \
       -Penable-integration-tests \
       -DtrimStackTrace=false \
       -Dclirr.skip=true \