diff --git a/requirements.txt b/requirements.txt
index 58495df..4c5d5d3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ olefile==0.46
 opencv-python==4.2.0.34
 opt-einsum==3.1.0
 Pillow==7.1.2
-protobuf==3.11.4
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.7
 pycparser==2.20