diff --git a/src/technologies/u.json b/src/technologies/u.json
index b6fe0c1a8..d2f6df58a 100644
--- a/src/technologies/u.json
+++ b/src/technologies/u.json
@@ -199,7 +199,7 @@
     "cats": [
       15
     ],
-    "dom": "iframe[src*='^(https?:\/\/)?(www\.)?utteranc.es/client.js']",
+    "dom": "iframe[src*='^(https?:\/\/)?(www\.)?utteranc\.es/client.js']",
     "xhr": "^(https?:\/\/)?(www\.)?utteranc\.es\/.*\.(html|js|css)"
     "icon": "utterances.png",
     "website": "https://github.com/utterance/utterances"