diff --git a/requirements.txt b/requirements.txt
index 4d1cafb..97f6e83 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -86,7 +86,7 @@ POT==0.4.0
 progressbar2==3.39.2
 prometheus-client==0.3.1
 prompt-toolkit==1.0.15
-protobuf==3.6.1
+protobuf==3.15.0
 psutil==5.4.7
 ptyprocess==0.6.0
 pyasn1==0.4.2