diff --git a/requirements.txt b/requirements.txt
index 56445cd..e15e210 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ Pillow==6.2.0
 ply==3.11
 pretty-midi==0.2.8
 progress==1.5
-protobuf==3.8.0
+protobuf==3.18.3
 psutil==5.6.2
 pyasn1==0.4.5
 pycrypto==2.6.1