diff --git a/requirements.txt b/requirements.txt
index 94347b2..b7bcae5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -63,7 +63,7 @@ Pillow-SIMD==5.3.0.post0
 pluggy==0.8.1
 prometheus-client==0.5.0
 prompt-toolkit==2.0.7
-protobuf==3.6.1
+protobuf==3.15.0
 psutil==5.4.8
 ptyprocess==0.6.0
 py==1.7.0