diff --git a/requirements-gpu.txt b/requirements-gpu.txt
index 86a7cd3..3be1c97 100644
--- a/requirements-gpu.txt
+++ b/requirements-gpu.txt
@@ -20,7 +20,7 @@ mock==2.0.0
 numpy==1.14.5
 pbr==4.2.0
 Pillow==5.2.0
-protobuf==3.6.1
+protobuf==3.18.3
 pyparsing==2.2.0
 python-dateutil==2.7.3
 pytz==2018.5
diff --git a/requirements.txt b/requirements.txt
index fb3d37d..d2f1f38 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ mock==2.0.0
 numpy==1.14.5
 pbr==4.2.0
 Pillow==5.2.0
-protobuf==3.6.1
+protobuf==3.18.3
 pyparsing==2.2.0
 python-dateutil==2.7.3
 pytz==2018.5