diff --git a/Dockerfile b/Dockerfile
index 74e03bb..5dbf4fd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:apache
+FROM php:5.6-apache
 RUN apt-get update
 RUN apt-get install -y libicu-dev xz-utils git zlib1g-dev python npm nodejs-legacy
 RUN docker-php-ext-install mbstring