diff --git a/requirements.txt b/requirements.txt
index e98d3bb..605ccef 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -71,7 +71,7 @@ Pillow==5.4.1
 pluggy==0.9.0
 prometheus-client==0.5.0
 prompt-toolkit==2.0.7
-protobuf==3.6.1
+protobuf==3.15.0
 ptyprocess==0.6.0
 py==1.8.0
 pycryptodome==3.8.1
diff --git a/requirements_gpu.txt b/requirements_gpu.txt
index 604ac3f..7b82848 100644
--- a/requirements_gpu.txt
+++ b/requirements_gpu.txt
@@ -71,7 +71,7 @@ Pillow==5.4.1
 pluggy==0.9.0
 prometheus-client==0.5.0
 prompt-toolkit==2.0.7
-protobuf==3.6.1
+protobuf==3.15.0
 ptyprocess==0.6.0
 py==1.8.0
 pycryptodome==3.8.1