diff --git a/pyproject.toml b/pyproject.toml
index 4d3b97c..604fa88 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,7 +22,7 @@ classifiers = [
 dependencies = [
     "authlib",
     "certifi",
-    "confluent-kafka >= 1.6.1",
+    "confluent-kafka >= 1.6.1, != 2.1.0",
     "requests",
     "typing-extensions; python_version<='3.7'"
 ]