diff --git a/go.mod b/go.mod
new file mode 100644
index 00000000..094934fa
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module github.com/golang/groupcache
+
+go 1.13
+
+require github.com/golang/protobuf v1.3.3
diff --git a/go.sum b/go.sum
new file mode 100644
index 00000000..b1efb8b2
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,2 @@
+github.com/golang/protobuf v1.3.3 h1:gyjaxf+svBWX08ZjK86iN9geUJF0H6gp2IRKX6Nf6/I=
+github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=