diff --git a/requirements.txt b/requirements.txt
index cd05c1d..b057252 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ pexpect==4.7.0
 pickleshare==0.7.5
 Pillow==7.0.0
 prompt-toolkit==3.0.2
-protobuf==3.11.2
+protobuf==3.15.0
 ptyprocess==0.6.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8