diff --git a/LICENSE b/LICENSE
index 2a877b7..4cbdef4 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2014-2015 Filippo Valsorda
+Copyright (c) 2014-2021 Filippo Valsorda
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..8de672b
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/FiloSottile/Heartbleed
+
+go 1.16