diff --git a/Pipfile b/Pipfile
index f6c2c10..9e6206a 100644
--- a/Pipfile
+++ b/Pipfile
@@ -4,7 +4,7 @@ verify_ssl = true
 name = "pypi"
 
 [packages]
-web3 = "*"
+web3 = "<=6.16.0"
 twisted = "*"
 eth-account = "<=0.10.0"
 eth-typing = "<4,>=3.5.2"
diff --git a/Pipfile.lock b/Pipfile.lock
index b2c8388..ebf7f50 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "5f278b5921f1bb92f86491e0d740e235d538ce8d6fa158324253f8f082eb7671"
+            "sha256": "c4d390bd2796407eb956097d922d5563801beeefd174565c58fa7baf5eecfa48"
         },
         "pipfile-spec": 6,
         "requires": {