diff --git a/.appveyor.yml b/.appveyor.yml
index 8c81e3b..963eed7 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -1,12 +1,10 @@
 version: "{build}"
 
-clone_folder: c:\gopath\src\github.com\philippgille\serve
-
 # GitHub specific alternative to `clone_depth: <number>`
 shallow_clone: true
 
 environment:
-  GOPATH: c:\gopath
+  GO111MODULE: on
 
 stack: go 1.12
 
diff --git a/.travis.yml b/.travis.yml
index 4386db0..dc9b320 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,9 @@ language: go
 go:
   - "1.12"
 
+env:
+  - GO111MODULE=on
+
 before_install:
   - go version
   - go env
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..4b0592e
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/philippgille/serve
+
+go 1.12