diff --git a/pyproject.toml b/pyproject.toml
index fa155bb..bec1fd4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ dependencies = [
     "pandas==2.2.3",
     "pandas-stubs~=2.2.3",
     "pettingzoo==1.24.3",
-    "protobuf==6.31.1",
+    "protobuf==6.33.5",
     "pyarrow==19.0.1",
     "pyqt5~=5.15.11",
     "pyqtgraph~=0.13.7",
diff --git a/requirements.txt b/requirements.txt
index 9eb8db2..00d52d7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ numpy==2.1.3
 packaging==24.2
 pandas==2.2.3
 pettingzoo==1.24.3
-protobuf==6.31.1
+protobuf==6.33.5
 pyarrow==19.0.1
 python-dateutil==2.9.0.post0
 pytz==2025.2