diff --git a/conformance/test/_util.py b/conformance/test/_util.py
index 9bc70ce..54facef 100644
--- a/conformance/test/_util.py
+++ b/conformance/test/_util.py
@@ -1,7 +1,7 @@
 import asyncio
 import sys
 
-VERSION_CONFORMANCE = "v1.0.4"
+VERSION_CONFORMANCE = "0bed9ca203aeda4e344edc442a4b2ede91726db5"
 
 
 async def create_standard_streams():
diff --git a/conformance/test/test_server.py b/conformance/test/test_server.py
index e3bad2c..5ae376b 100644
--- a/conformance/test/test_server.py
+++ b/conformance/test/test_server.py
@@ -52,9 +52,6 @@ def test_server_sync(server: str) -> None:
         "**/bidi-stream/full-duplex/**",
     ]
     match server:
-        case "granian" | "hypercorn":
-            # granian and hypercorn seem to have issues with concurrency
-            opts += ["--parallel", "1"]
         case "gunicorn":
             # gunicorn doesn't support HTTP/2
             opts = ["--skip", "**/HTTPVersion:2/**"]
@@ -94,9 +91,6 @@ def test_server_async(server: str) -> None:
     )
     opts = []
     match server:
-        case "granian" | "hypercorn":
-            # granian and hypercorn seem to have issues with concurrency
-            opts = ["--parallel", "1"]
         case "uvicorn":
             # uvicorn doesn't support HTTP/2
             opts = ["--skip", "**/HTTPVersion:2/**"]