diff --git a/package.json b/package.json
index eb0180f..be534ae 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "testpilot-metrics": "^2.1.0"
   },
   "engines": {
-    "firefox": ">=50.0"
+    "firefox": ">=51.0"
   },
   "permissions": {
     "multiprocess": true
diff --git a/webextension/manifest.json b/webextension/manifest.json
index fd0546a..20f34ee 100644
--- a/webextension/manifest.json
+++ b/webextension/manifest.json
@@ -11,8 +11,7 @@
 
   "applications": {
     "gecko": {
-      "id": "testpilot-containers@mozilla.org",
-      "strict_min_version": "50.0",
+      "strict_min_version": "51.0",
       "update_url": "https://testpilot.firefox.com/files/@testpilot-containers/updates.json"
     }
   },