diff --git a/Dockerfile b/Dockerfile
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@
 # Prepare the container
 #
 
-ENV PHP_VERSION 5.6.25
+ENV PHP_VERSION 5.6.28
 ENV PHP_INI_DIR /usr/local/etc/php
 ENV PHP_BUILD_DEPS bzip2 \
 		file \