diff --git a/requirements.txt b/requirements.txt
index 5806689..c91df1b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ more-itertools==6.0.0
 numpy==1.16.1
 pandas==0.24.1
 Pillow==5.4.1
-protobuf==3.6.1
+protobuf==3.15.0
 PyAudio==0.2.11
 pygame==1.9.4
 pyparsing==2.3.1