diff --git a/webmachine.opam b/webmachine.opam
index 1164682..a291d82 100644
--- a/webmachine.opam
+++ b/webmachine.opam
@@ -1,3 +1,4 @@
+version: "0.6.3"
 opam-version: "2.0"
 maintainer: "Spiros Eliopoulos <spiros@inhabitedtype.com>"
 authors: [ "Spiros Eliopoulos <spiros@inhabitedtype.com>" ]