diff --git a/Userland/Libraries/LibWeb/CSS/Enums.json b/Userland/Libraries/LibWeb/CSS/Enums.json
index 59d2d925f69..74fc49c9c00 100644
--- a/Userland/Libraries/LibWeb/CSS/Enums.json
+++ b/Userland/Libraries/LibWeb/CSS/Enums.json
@@ -369,6 +369,10 @@
     "middle",
     "end"
   ],
+  "text-overflow": [
+    "clip",
+    "ellipsis"
+  ],
   "scrollbar-gutter": [
     "auto",
     "stable",
diff --git a/Userland/Libraries/LibWeb/CSS/Identifiers.json b/Userland/Libraries/LibWeb/CSS/Identifiers.json
index cc55d849049..f8bb85149c2 100644
--- a/Userland/Libraries/LibWeb/CSS/Identifiers.json
+++ b/Userland/Libraries/LibWeb/CSS/Identifiers.json
@@ -141,6 +141,7 @@
   "ease-in",
   "ease-in-out",
   "ease-out",
+  "ellipsis",
   "enabled",
   "end",
   "evenodd",
diff --git a/Userland/Libraries/LibWeb/CSS/Properties.json b/Userland/Libraries/LibWeb/CSS/Properties.json
index 63620977368..1a89a8ecb10 100644
--- a/Userland/Libraries/LibWeb/CSS/Properties.json
+++ b/Userland/Libraries/LibWeb/CSS/Properties.json
@@ -2559,6 +2559,15 @@
       "text-justify"
     ]
   },
+  "text-overflow": {
+    "affects-layout": false,
+    "animation-type": "discrete",
+    "inherited": false,
+    "initial": "clip",
+    "valid-types": [
+      "text-overflow"
+    ]
+  },
   "text-shadow": {
     "affects-layout": false,
     "animation-type": "custom",