diff --git a/14/Dockerfile b/14/Dockerfile
index da96cfe..8ce29d0 100644
--- a/14/Dockerfile
+++ b/14/Dockerfile
@@ -142,7 +142,7 @@ RUN set -eux; \
 		/usr/local/share/man \
 	; \
 	\
-    apk --no-cache update; \
+    apk --no-cache update && apk --no-cache upgrade; \
 	postgres --version
 
 # make the sample config easier to munge (and "correct by default")