diff --git a/requirements.txt b/requirements.txt
index 7ef1999..305f31c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 Flask==1.1.1
 hashedindex==0.4.4
-protobuf==3.10.0
+protobuf==3.18.3
 PyPDF2==1.26.0
 google-cloud-vision==0.40.0
 gunicorn
\ No newline at end of file