diff --git a/requirements.txt b/requirements.txt
index 46405e5..cd0ff4a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -48,7 +48,7 @@ pickleshare==0.7.5
 Pillow==6.2.0
 prometheus-client==0.7.1
 prompt-toolkit==2.0.9
-protobuf==3.8.0
+protobuf==3.15.0
 ptyprocess==0.6.0
 Pygments==2.4.2
 pyparsing==2.4.0
diff --git a/requirements_cpu.txt b/requirements_cpu.txt
index 200dfdc..74570ce 100644
--- a/requirements_cpu.txt
+++ b/requirements_cpu.txt
@@ -48,7 +48,7 @@ pickleshare==0.7.5
 Pillow==6.2.0
 prometheus-client==0.7.1
 prompt-toolkit==2.0.9
-protobuf==3.8.0
+protobuf==3.15.0
 ptyprocess==0.6.0
 Pygments==2.4.2
 pyparsing==2.4.0