diff --git a/requirements.txt b/requirements.txt
index dd9f161..360d749 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -68,7 +68,7 @@ Pillow==6.0.0
 pretty-midi==0.2.8
 promise==2.2.1
 prompt-toolkit==2.0.9
-protobuf==3.8.0
+protobuf==3.15.0
 psutil==5.6.3
 ptyprocess==0.6.0
 pyasn1==0.4.5