diff --git a/go.mod b/go.mod
index 5711cb3..1022f54 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,6 @@
 module github.com/google/gousb
 
-go 1.13
+go 1.16
+
+// Released in error, v1.* remains the current version.
+retract v2.1.0+incompatible