diff --git a/lib/bindings/http/constants.js b/lib/bindings/http/constants.js
index c4d312f..c9ebeda 100644
--- a/lib/bindings/http/constants.js
+++ b/lib/bindings/http/constants.js
@@ -5,6 +5,7 @@ module.exports = {
 
   SPEC_V02 : "0.2",
   SPEC_V03 : "0.3",
+  SPEC_V1  : "1.0",
 
   DEFAULT_SPEC_VERSION_HEADER : "ce-specversion",