diff --git a/requirements.txt b/requirements.txt
index bf8af3c..7f921f1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -105,7 +105,7 @@ plac==1.1.3
 preshed==3.0.2
 prometheus-client==0.8.0
 prompt-toolkit==3.0.5
-protobuf==3.12.2
+protobuf==3.15.0
 ptyprocess==0.6.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8