diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index e3f3d7702..16756a4d8 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -10384,7 +10384,7 @@ interface Node extends EventTarget {
     /**
      * Returns the next sibling.
      */
-    readonly nextSibling: Node | null;
+    readonly nextSibling: ChildNode | null;
     /**
      * Returns a string appropriate for the type of node, as
      * follows:
diff --git a/inputfiles/overridingTypes.json b/inputfiles/overridingTypes.json
index a44f61919..f9408ba76 100644
--- a/inputfiles/overridingTypes.json
+++ b/inputfiles/overridingTypes.json
@@ -674,6 +674,9 @@
                             "read-only": 1,
                             "override-type": "string | null",
                             "deprecated": 1
+                        },
+                        "nextSibling": {
+                            "override-type": "ChildNode | null"
                         }
                     }
                 }