diff --git a/.travis.yml b/.travis.yml
index d00be5d..8045c08 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,8 @@ language: go
 go_import_path: maunium.net/go/gomuks
 go:
   - "1.11"
+env:
+  - "GO111MODULE=on"
 notifications:
   email: false
 install: