diff --git a/9.3/alpine/Dockerfile b/9.3/alpine/Dockerfile
index a70581c7fc..bc46944858 100644
--- a/9.3/alpine/Dockerfile
+++ b/9.3/alpine/Dockerfile
@@ -22,8 +22,8 @@ ENV LANG en_US.utf8
 RUN mkdir /docker-entrypoint-initdb.d
 
 ENV PG_MAJOR 9.3
-ENV PG_VERSION 9.3.17
-ENV PG_SHA256 9c03e5f280cfe9bd202fa01af773eb146abd8ab3065f7279d574c568f6948dbe
+ENV PG_VERSION 9.3.18
+ENV PG_SHA256 ad60d12a5a3dd0f6f5904c41b87e43eff49d3f74e45129fe52c5744366ff2fe0
 
 ENV OSSP_UUID_VERSION 1.6.2
 ENV OSSP_UUID_SHA256 11a615225baa5f8bb686824423f50e4427acd3f70d394765bdff32801f0fd5b0