diff --git a/Userland/Libraries/LibWeb/CSS/Identifiers.json b/Userland/Libraries/LibWeb/CSS/Identifiers.json
index 518003d6b97..742f606c418 100644
--- a/Userland/Libraries/LibWeb/CSS/Identifiers.json
+++ b/Userland/Libraries/LibWeb/CSS/Identifiers.json
@@ -142,6 +142,7 @@
   "inline",
   "inline-block",
   "inline-flex",
+  "inline-grid",
   "inline-table",
   "inset",
   "inside",
diff --git a/Userland/Libraries/LibWeb/CSS/Properties.json b/Userland/Libraries/LibWeb/CSS/Properties.json
index 4e5abc75c75..1e957ebabc1 100644
--- a/Userland/Libraries/LibWeb/CSS/Properties.json
+++ b/Userland/Libraries/LibWeb/CSS/Properties.json
@@ -609,6 +609,7 @@
       "inline",
       "inline-block",
       "inline-flex",
+      "inline-grid",
       "inline-table",
       "list-item",
       "none",