diff --git a/private-browsing-theme/manifest.json b/private-browsing-theme/manifest.json
index f83589a..b718584 100644
--- a/private-browsing-theme/manifest.json
+++ b/private-browsing-theme/manifest.json
@@ -10,7 +10,7 @@
   "applications": {
     "gecko": {
       "id": "private-window-theme@mozilla.org",
-      "strict_min_version": "57.0b14"
+      "strict_min_version": "58.0"
     }
   }
 }