diff --git a/ml-requirements.txt b/ml-requirements.txt
index 29f3698..a3bdd04 100644
--- a/ml-requirements.txt
+++ b/ml-requirements.txt
@@ -30,7 +30,7 @@ oauthlib==3.1.0
 opt-einsum==3.3.0
 packaging==21.0
 Pillow==8.3.2
-protobuf==3.14.0
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pyparsing==2.4.7
diff --git a/tpu-servers/requirements.txt b/tpu-servers/requirements.txt
index 3b8abd0..18feb6d 100644
--- a/tpu-servers/requirements.txt
+++ b/tpu-servers/requirements.txt
@@ -16,7 +16,7 @@ netifaces==0.10.4
 numpy==1.17.0
 pbr==5.2.0
 Pillow==6.0.0
-protobuf==3.0.0
+protobuf==3.15.0
 pycurl==7.43.0
 pygobject==3.22.0
 PyJWT==1.4.2