diff --git a/cv/requirements.txt b/cv/requirements.txt
index 932b581..57a20b9 100644
--- a/cv/requirements.txt
+++ b/cv/requirements.txt
@@ -49,7 +49,7 @@ pexpect==4.6.0
 pickleshare==0.7.4
 Pillow==5.3.0
 prompt-toolkit==1.0.15
-protobuf==3.6.0
+protobuf==3.15.0
 ptyprocess==0.6.0
 pyasn1==0.4.4
 pyasn1-modules==0.2.2