diff --git a/python_experiments/requirements.txt b/python_experiments/requirements.txt
index 502a271..119bc22 100644
--- a/python_experiments/requirements.txt
+++ b/python_experiments/requirements.txt
@@ -29,7 +29,7 @@ networkx==2.1
 numpy==1.14.2
 opencv-python==3.4.0.12
 Pillow==6.2.0
-protobuf==3.6.1
+protobuf==3.18.3
 pyglet==1.3.1
 pymongo==3.6.1
 pyparsing==2.2.0