diff --git a/requirements.txt b/requirements.txt
index d687c97..b0c0698 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ networkx==2.3
 numpy==1.17.2
 opencv-python==4.2.0.32
 Pillow==9.0.1
-protobuf==3.15.0
+protobuf==3.18.3
 pycparser==2.19
 pyparsing==2.4.2
 pypng==0.0.20