diff --git a/aiohttp_apischema/generator.py b/aiohttp_apischema/generator.py
index 7663443..b8a28f4 100644
--- a/aiohttp_apischema/generator.py
+++ b/aiohttp_apischema/generator.py
@@ -352,17 +352,10 @@ async def _on_startup(self, app: web.Application) -> None:
                         # Strip qualifiers (Required/NotRequired) from param_type.
                         # TODO(PY311): (remove tuple) Annotated[insp.type, *insp.metadata]
                         param_type = Annotated[(insp.type, *insp.metadata)] if insp.metadata else insp.type
-                        extracted_type = insp.type
-                        while get_origin(extracted_type) is Literal:
-                            extracted_type = get_args(extracted_type)[0]
-                        try:
-                            is_str = issubclass(extracted_type, str)  # type: ignore[arg-type]
-                        except TypeError:
-                            is_str = isinstance(extracted_type, str)  # Literal
+                        models.append((key, "validation", TypeAdapter(param_type)))
 
                         # We also need to convert values to Json for runtime checking.
-                        ann_type = param_type if is_str else Json[param_type]  # type: ignore[misc,valid-type]
-                        models.append((key, "validation", TypeAdapter(ann_type)))
+                        ann_type = param_type | Json[param_type]
                         td[param_name] = Required[ann_type] if required else NotRequired[ann_type]
                     endpoints["query"] = TypeAdapter(TypedDict(query.__name__, td))  # type: ignore[attr-defined,operator]
                 for code, model in endpoints["resps"].items():
diff --git a/tests/test_generator.py b/tests/test_generator.py
index 005c80d..86308ce 100644
--- a/tests/test_generator.py
+++ b/tests/test_generator.py
@@ -314,16 +314,9 @@ async def handler(request: web.Request, *, query: QueryArgs) -> APIResponse[int]
            "prefixItems": [{"type": "string"}, {"type": "integer"}, {"type": "number"}]}
     paths = {"/foo": {"get": {
         "operationId": "handler",
-        "parameters": [{"name": "foo", "in": "query", "required": True, "schema": {
-                            "contentMediaType": "application/json",
-                            "contentSchema": {"type": "integer"}, "type": "string"}},
-                       {"name": "bar", "in": "query", "required": False, "schema": {
-                            "contentMediaType": "application/json",
-                            "contentSchema": bar, "type": "string"}},
-                       {"name": "baz", "in": "query", "required": True, "schema": {
-                            "contentMediaType": "application/json",
-                            "contentSchema": {"$ref": "#/components/schemas/Baz"},
-                            "type": "string"}},
+        "parameters": [{"name": "foo", "in": "query", "required": True, "schema": {"type": "integer"}},
+                       {"name": "bar", "in": "query", "required": False, "schema": bar},
+                       {"name": "baz", "in": "query", "required": True, "schema": {"$ref": "#/components/schemas/Baz"}},
                        {"name": "spam", "in": "query", "required": False, "schema": {
                             "type": "string", "const": "eggz"}}],
         "responses": {
@@ -354,6 +347,32 @@ async def handler(request: web.Request, *, query: QueryArgs) -> APIResponse[int]
         assert result[1]["type"] == "string_type"
 
 
+async def test_query_literal(aiohttp_client: AiohttpClient) -> None:
+    schema_gen = SchemaGenerator()
+
+    class QueryArgs(TypedDict):
+        foo: Literal[42, "spam"]
+
+    @schema_gen.api()
+    async def handler(request: web.Request, *, query: QueryArgs) -> APIResponse[int | str]:
+        return APIResponse(query["foo"])
+
+    app = web.Application()
+    schema_gen.setup(app)
+    app.router.add_get("/foo", handler)
+
+    client = await aiohttp_client(app)
+    async with client.get("/foo", params={"foo": 42}) as resp:
+        assert resp.status == 200
+        result = await resp.json()
+        assert result == 42
+
+    async with client.get("/foo", params={"foo": "spam"}) as resp:
+        assert resp.status == 200
+        result = await resp.json()
+        assert result == "spam"
+
+
 async def test_query_pydantic_annotations(aiohttp_client: AiohttpClient) -> None:
     schema_gen = SchemaGenerator()
 
@@ -374,7 +393,7 @@ async def handler(request: web.Request, *, query: QueryArgs) -> APIResponse[int]
         schema = await resp.json()
 
     param = schema["paths"]["/foo"]["get"]["parameters"][0]
-    assert param["schema"]["contentSchema"]["description"] == "Some description"
+    assert param["schema"]["description"] == "Some description"
     assert param["schema"]["default"] == 42
 
     async with client.get("/foo") as resp: