diff --git a/TrackR-CNN/requirements.txt b/TrackR-CNN/requirements.txt
index 9b765e7..8123008 100644
--- a/TrackR-CNN/requirements.txt
+++ b/TrackR-CNN/requirements.txt
@@ -29,7 +29,7 @@ oauthlib==3.1.0
 opencv-python==4.1.2.30
 opt-einsum==3.1.0
 Pillow==6.2.1
-protobuf==3.11.2
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.7
 pycocotools==2.0.0