diff --git a/appveyor.yml b/appveyor.yml
index 1f30f3b..598ff4b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -20,7 +20,6 @@ install:
   - go version
   - go env
   - go get github.com/urfave/gfmrun/cmd/gfmrun
-  - go mod vendor
 
 build_script:
   - go run build.go vet