diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d852e7ae4..7267e1b1c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: elixir:1.5
+image: elixir:1.6.4-alpine
 
 services:
   - postgres:9.6.2