diff --git a/requirements.txt b/requirements.txt
index dc6e512..9876f2a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -47,7 +47,7 @@ opencv-python==4.2.0.34
 opt-einsum==0+untagged.56.g2664021.dirty
 pandas==1.0.3
 Pillow==7.1.2
-protobuf==3.11.4
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.7
 pyclipper==1.1.0.post3