diff --git a/src/setup.py b/src/setup.py
index f678f32..9d9a1c5 100644
--- a/src/setup.py
+++ b/src/setup.py
@@ -13,7 +13,7 @@
         "pandas",
         "requests",
         "requests_toolbelt",
-        "web3>=6.4.0",
+        "web3>=6.4.0,<7.0.0",
         "gql",
     ],
     classifiers=[