diff --git a/requirements.txt b/requirements.txt
index 2fb1b1ea012..18d05213ebc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -52,7 +52,7 @@ pickleshare~=0.7.5
 Pillow~=8.1.2
 prometheus-client~=0.9.0
 prompt-toolkit~=3.0.17
-protobuf~=3.15.5
+protobuf~=3.15.6
 psutil~=5.8.0
 pyasn1~=0.4.8
 pyasn1-modules~=0.2.8