diff --git a/lib/thor/version.rb b/lib/thor/version.rb
index defb8341e..506c9b1b1 100644
--- a/lib/thor/version.rb
+++ b/lib/thor/version.rb
@@ -1,3 +1,3 @@
 class Thor
-  VERSION = "0.20.3"
+  VERSION = "1.0.0"
 end