diff --git a/.travis.yml b/.travis.yml
index 9a68b56..f59a345 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,6 @@
 language: go
 go:
-- "1.10"
-- "1.11"
-- "1.12"
+- "1.13"
 - tip
 matrix:
   allow_failures:
diff --git a/go.mod b/go.mod
index 0a4c652..0fa6533 100644
--- a/go.mod
+++ b/go.mod
@@ -1 +1,18 @@
 module github.com/rs/cors
+
+go 1.13
+
+require (
+	github.com/codegangsta/inject v0.0.0-20150114235600-33e0aa1cb7c0 // indirect
+	github.com/codegangsta/negroni v1.0.0
+	github.com/gin-gonic/gin v1.5.0
+	github.com/go-martini/martini v0.0.0-20170121215854-22fa46961aab
+	github.com/gobuffalo/buffalo v0.15.3
+	github.com/gorilla/mux v1.7.3
+	github.com/julienschmidt/httprouter v1.3.0
+	github.com/justinas/alice v1.2.0
+	github.com/martini-contrib/render v0.0.0-20150707142108-ec18f8345a11
+	github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c // indirect
+	github.com/pressly/chi v4.0.2+incompatible
+	github.com/zenazn/goji v0.9.0
+)