diff --git a/requirements.txt b/requirements.txt
index 7af6589..0183f5b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ packaging==20.3
 pandas==1.0.3
 pathspec==0.8.0
 Pillow==7.1.1
-protobuf==3.11.3
+protobuf==3.15.0
 PyAudio==0.2.11
 pyAudioAnalysis==0.2.5
 pycodestyle==2.5.0