diff --git a/.travis.yml b/.travis.yml
index 018bdabc2f..41255ff1fc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,5 +8,6 @@ go:
 go_import_path: github.com/prometheus/prometheus
 
 script:
+- GO111MODULE=on travis_retry go mod download
 - make check_license style unused test staticcheck check_assets
 - git diff --exit-code