diff --git a/12/Dockerfile b/12/Dockerfile
index 379d781643..5a9fce3788 100644
--- a/12/Dockerfile
+++ b/12/Dockerfile
@@ -71,7 +71,7 @@ RUN set -ex; \
 	apt-key list
 
 ENV PG_MAJOR 12
-ENV PG_VERSION 12~beta3-1.pgdg100+1
+ENV PG_VERSION 12~beta4-1.pgdg100+1
 
 RUN set -ex; \
 	\