diff --git a/requirements.txt b/requirements.txt
index 07d29c4..909abe4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ opencv-python==4.1.0.25
 Pillow==6.1.0
 plac==0.9.6
 preshed==2.0.1
-protobuf==3.9.1
+protobuf==3.18.3
 pytesseract==0.2.7
 pytz==2019.2
 requests==2.22.0