diff --git a/.travis.yml b/.travis.yml
index 34beb03..4ae44a9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -49,7 +49,9 @@ jobs:
       os: linux
     - go: "1.12.x"
       os: linux
-    - go: "1.12.x"
+    - go: "1.13.x"
+      os: linux
+    - go: "1.13.x"
       os: osx
-    - go: "1.12.x"
+    - go: "1.13.x"
       os: windows
diff --git a/go.mod b/go.mod
index cb540ac..0d5cb7c 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,7 @@
 module github.com/google/wire
 
+go 1.12
+
 require (
 	github.com/fatih/color v1.7.0
 	github.com/google/go-cmp v0.2.0