diff --git a/requirements.txt b/requirements.txt
index d3b9e49..a1e7eba 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,7 +38,7 @@ opencv-python==4.2.0.32
 opt-einsum==3.1.0
 Pillow==7.0.0
 progressbar2==3.50.0
-protobuf==3.11.4
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.7
 pycparser==2.20