diff --git a/dockerfiles/slim/Dockerfile b/dockerfiles/slim/Dockerfile
index b9de620..2bc672c 100644
--- a/dockerfiles/slim/Dockerfile
+++ b/dockerfiles/slim/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:slim
+FROM python:3.4-slim
 
 ENV BUILD_DEPS gcc g++