use aiohttp less then 4.0.0
diff --git a/gremlin-python/src/main/python/setup.py b/gremlin-python/src/main/python/setup.py
index 7202e1f..29f3d50 100644
--- a/gremlin-python/src/main/python/setup.py
+++ b/gremlin-python/src/main/python/setup.py
@@ -46,7 +46,7 @@
 
 install_requires = [
     'nest_asyncio',
-    'aiohttp>=3.8.0,<=4.0.0',
+    'aiohttp>=3.8.0,<4.0.0',
     'aenum>=1.4.5,<3.0.0',
     'six>=1.10.0,<2.0.0',
     'isodate>=0.6.0,<1.0.0'