diff --git a/12/alpine/Dockerfile b/12/alpine/Dockerfile
index 2b41cdb0a1..72adc40aaa 100644
--- a/12/alpine/Dockerfile
+++ b/12/alpine/Dockerfile
@@ -22,8 +22,8 @@ ENV LANG en_US.utf8
 RUN mkdir /docker-entrypoint-initdb.d
 
 ENV PG_MAJOR 12
-ENV PG_VERSION 12beta3
-ENV PG_SHA256 e4a4079c75bf049349c70a02f705beecbb8263684ff2d4e13a582a3ff50332aa
+ENV PG_VERSION 12beta4
+ENV PG_SHA256 422f5e2ad999126f505b44c2d56abe726a08ed7e50e2d268e9906c879831805f
 
 RUN set -ex \
 	\