diff --git a/src/a2a/server/apps/jsonrpc/jsonrpc_app.py b/src/a2a/server/apps/jsonrpc/jsonrpc_app.py
index 27839cd35..c6f78d119 100644
--- a/src/a2a/server/apps/jsonrpc/jsonrpc_app.py
+++ b/src/a2a/server/apps/jsonrpc/jsonrpc_app.py
@@ -64,7 +64,14 @@
     from starlette.exceptions import HTTPException
     from starlette.requests import Request
     from starlette.responses import JSONResponse, Response
-    from starlette.status import HTTP_413_REQUEST_ENTITY_TOO_LARGE
+
+    try:
+        # Starlette v0.48.0
+        from starlette.status import HTTP_413_CONTENT_TOO_LARGE
+    except ImportError:
+        from starlette.status import (  # type: ignore[no-redef]
+            HTTP_413_REQUEST_ENTITY_TOO_LARGE as HTTP_413_CONTENT_TOO_LARGE,
+        )
 
     _package_starlette_installed = True
 else:
@@ -76,7 +83,14 @@
         from starlette.exceptions import HTTPException
         from starlette.requests import Request
         from starlette.responses import JSONResponse, Response
-        from starlette.status import HTTP_413_REQUEST_ENTITY_TOO_LARGE
+
+        try:
+            # Starlette v0.48.0
+            from starlette.status import HTTP_413_CONTENT_TOO_LARGE
+        except ImportError:
+            from starlette.status import (
+                HTTP_413_REQUEST_ENTITY_TOO_LARGE as HTTP_413_CONTENT_TOO_LARGE,
+            )
 
         _package_starlette_installed = True
     except ImportError:
@@ -90,7 +104,7 @@
         Request = Any
         JSONResponse = Any
         Response = Any
-        HTTP_413_REQUEST_ENTITY_TOO_LARGE = Any
+        HTTP_413_CONTENT_TOO_LARGE = Any
 
 
 class StarletteUserProxy(A2AUser):
@@ -381,7 +395,7 @@ async def _handle_requests(self, request: Request) -> Response:  # noqa: PLR0911
                 None, A2AError(root=JSONParseError(message=str(e)))
             )
         except HTTPException as e:
-            if e.status_code == HTTP_413_REQUEST_ENTITY_TOO_LARGE:
+            if e.status_code == HTTP_413_CONTENT_TOO_LARGE:
                 return self._generate_error_response(
                     request_id,
                     A2AError(