diff --git a/sdk/pyproject.toml b/sdk/pyproject.toml
index a347c2c..7b57507 100644
--- a/sdk/pyproject.toml
+++ b/sdk/pyproject.toml
@@ -23,7 +23,7 @@ classifiers = [
 ]
 dependencies = [
     "grpcio>=1.81.1,<2",
-    "protobuf>=6.31.0,<7",
+    "protobuf>=6.33.6,<7",
     "googleapis-common-protos>=1.75.0,<2",
 ]