diff --git a/pyproject.toml b/pyproject.toml
index 9d23dab..7ba9a03 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ dependencies = [
   "frequenz-api-reporting >= 0.7.0, < 0.8",
   "frequenz-client-common >= 0.3.0, < 0.4",
   "grpcio >=1.70.0, < 2",
-  "protobuf >=5.29.3, < 6",
+  "protobuf >= 5.29.3, < 7",
   "frequenz-client-base >= 0.8.0, < 0.10.0",
 ]
 dynamic = ["version"]