diff --git a/package.json b/package.json
index 014db94ade..a65370976f 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,6 @@
     "test:diff:xs": "test262-harness -t 8 --hostType=xs --hostPath=xs $(npm run --silent diff)"
   },
   "dependencies": {
-    "@tc39/ecma262-biblio": "^2.1.2458"
+    "@tc39/ecma262-biblio": "^2.1.2897"
   }
 }
diff --git a/tools/lint/lib/checks/esid.py b/tools/lint/lib/checks/esid.py
index fbe1f4fc41..7cf09ae394 100644
--- a/tools/lint/lib/checks/esid.py
+++ b/tools/lint/lib/checks/esid.py
@@ -13,7 +13,7 @@ class CheckEsid(Check):
         # https://url.spec.whatwg.org/#fragment-state
         # However, that must also include "%"
         self.esidRegex = re.compile(
-            u"^[a-z0-9!$%&'()*+,\-./:;=?@_~\u00a0-\U0010fffd]+$", re.IGNORECASE
+            u"^[a-z0-9!$%&'()*+,\\-./:;=?@_~\u00a0-\U0010fffd]+$", re.IGNORECASE
         )
 
     def run(self, name, meta, source):