diff --git a/go.mod b/go.mod
index c4af3ec..6a004e4 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,7 @@
 module golang.org/x/crypto
 
+go 1.11
+
 require (
 	golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3
 	golang.org/x/sys v0.0.0-20190412213103-97732733099d