diff --git a/src/manifest-ff.json b/src/manifest-ff.json
index ae1f79805..0f2e5343d 100644
--- a/src/manifest-ff.json
+++ b/src/manifest-ff.json
@@ -1,6 +1,6 @@
 {
   "manifest_version": 2,
-  "version": "5.2.0",
+  "version": "6.0.0",
   "name": "__MSG_extName__",
   "description": "__MSG_extDescription__",
   "default_locale": "en",
diff --git a/src/manifest.json b/src/manifest.json
index 655db401e..67c6dc30b 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -1,6 +1,6 @@
 {
   "manifest_version": 2,
-  "version": "5.2.0",
+  "version": "6.0.0",
   "name": "__MSG_extName__",
   "description": "__MSG_extDescription__",
   "default_locale": "en",