diff --git a/codegen/parser/schemas/__init__.py b/codegen/parser/schemas/__init__.py
index c6a347cd..9a983bdf 100644
--- a/codegen/parser/schemas/__init__.py
+++ b/codegen/parser/schemas/__init__.py
@@ -29,7 +29,7 @@ def parse_schema(
     data = source.data
     try:
         if overrides := get_schema_override(source):
-            data = merge_dict(data, overrides)
+            merge_dict(data, overrides)
         data = parse_obj_as(Union[oas.Reference, oas.Schema], data)
     except Exception as e:
         raise TypeError(f"Invalid Schema from {source.uri}") from e
diff --git a/githubkit/rest/models.py b/githubkit/rest/models.py
index 44b1a9df..16afada1 100644
--- a/githubkit/rest/models.py
+++ b/githubkit/rest/models.py
@@ -6569,7 +6569,7 @@ class PullRequestSimplePropLabelsItems(GitHubRestModel):
     node_id: str = Field(default=...)
     url: str = Field(default=...)
     name: str = Field(default=...)
-    description: str = Field(default=...)
+    description: Union[str, None] = Field(default=...)
     color: str = Field(default=...)
     default: bool = Field(default=...)
 
diff --git a/githubkit/rest/types.py b/githubkit/rest/types.py
index e39896e0..06531e66 100644
--- a/githubkit/rest/types.py
+++ b/githubkit/rest/types.py
@@ -4698,7 +4698,7 @@ class PullRequestSimplePropLabelsItemsType(TypedDict):
     node_id: str
     url: str
     name: str
-    description: str
+    description: Union[str, None]
     color: str
     default: bool
 
diff --git a/pyproject.toml b/pyproject.toml
index 1dea34c7..f9e0edaa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -107,6 +107,9 @@ webhook-types-output = "githubkit/webhooks/types.py"
     { "$ref" = "#/components/schemas/repository" }
 ], "$ref" = {} }
 
+# https://github.com/github/rest-api-description/issues/1812
+"/components/schemas/pull-request-simple/properties/labels/items/properties/description" = { type = ["string", "null"] }
+
 
 [build-system]
 requires = ["poetry_core>=1.0.0"]