diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 96104a3dd..63d4fcab5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: mvdan/fdroid-ci:latest
+image: mvdan/fdroid-ci:20160316
 
 cache:
   paths:
diff --git a/F-Droid/tools/check-string-format.py b/F-Droid/tools/check-string-format.py
index 867090385..e24f8cc52 100755
--- a/F-Droid/tools/check-string-format.py
+++ b/F-Droid/tools/check-string-format.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 
 # Remove extra translations