diff --git a/.travis.yml b/.travis.yml
index ed26af8..0f7ac6f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,8 @@ language: go
 go:
   - "1.11.x"
   - "1.12.x"
+  - "1.13.x"
   - master
 
 env:
-  - GO111MODULE=on GOPROXY=direct
+  - GO111MODULE=on GOPROXY=direct GOSUMDB=off