diff --git a/requirements.txt b/requirements.txt
index 6fe8d50..113ee24 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ Markdown==3.2.2
 numpy==1.19.0
 opencv-python==4.3.0.36
 opt-einsum==3.2.1
-protobuf==3.12.2
+protobuf==3.18.3
 PyYAML==5.3.1
 scipy==1.5.1
 six==1.15.0