diff --git a/requirements.txt b/requirements.txt
index 9766e5b..6857f69 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ mpi4py==3.0.0
 numpy==1.15.2
 opencv-python==3.4.3.18
 Pillow==5.3.0
-protobuf==3.6.1
+protobuf==3.18.3
 pyglet==1.3.2
 requests==2.20.0
 scipy==1.1.0