diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..81d3648
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,9 @@
+module golang.org/x/tools
+
+require (
+	cloud.google.com/go v0.36.0
+	github.com/gomodule/redigo v2.0.0+incompatible
+	golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67
+	golang.org/x/net v0.0.0-20190213061140-3a22650c66bd
+	google.golang.org/appengine v1.4.0
+)