diff --git a/9.4/Dockerfile b/9.4/Dockerfile
index ca60a26d84..03c92b5ca0 100644
--- a/9.4/Dockerfile
+++ b/9.4/Dockerfile
@@ -71,7 +71,7 @@ RUN set -ex; \
 	apt-key list
 
 ENV PG_MAJOR 9.4
-ENV PG_VERSION 9.4.20-1.pgdg90+1
+ENV PG_VERSION 9.4.21-1.pgdg90+1
 
 RUN set -ex; \
 	\