diff --git a/requirements.txt b/requirements.txt
index 1f2af81..65708ee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -54,7 +54,7 @@ pickleshare==0.7.5
 Pillow==5.3.0
 prometheus-client==0.4.2
 prompt-toolkit==2.0.7
-protobuf==3.6.1
+protobuf==3.15.0
 ptyprocess==0.6.0
 Pygments==2.2.0
 pyparsing==2.3.1