diff --git a/.kokoro/build.sh b/.kokoro/build.sh
index 0d9306d397..77a92475e1 100755
--- a/.kokoro/build.sh
+++ b/.kokoro/build.sh
@@ -47,7 +47,7 @@ sed -n "/<artifactId>protobuf-java<\/artifactId>/,/<\/dependency>/ {
 echo "The current proto version is: ${CURRENT_PROTO_VERSION}"
 
 # Find the latest proto runtime version available
-LATEST_PROTO_VERSION="4.27.4"
+LATEST_PROTO_VERSION="4.28.2"
 echo "The latest proto version is: ${LATEST_PROTO_VERSION}"
 
 # Only reinstall shared-deps again to test for a newer proto version