diff --git a/requirements.txt b/requirements.txt
index 02412ff..b710c15 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -136,7 +136,7 @@ Pillow==8.1.1
 port-for==0.3.1
 progressbar2==3.10.0
 prompt-toolkit==1.0.7
-protobuf==3.5.2
+protobuf==3.15.0
 ptyprocess==0.5.1
 py2app==0.7.3
 pyarrow==0.9.0.post1