diff --git a/runtime/base/php-74.Dockerfile b/runtime/base/php-74.Dockerfile
index 0f85c0695..0aed9c787 100644
--- a/runtime/base/php-74.Dockerfile
+++ b/runtime/base/php-74.Dockerfile
@@ -36,7 +36,7 @@ RUN set -xe; \
     make install
 
 
-ENV VERSION_PHP=7.4.20
+ENV VERSION_PHP=7.4.21
 
 
 ENV PHP_BUILD_DIR=${BUILD_DIR}/php