diff --git a/requirements.txt b/requirements.txt
index 7590b73..a25973c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ networkx==2.1
 numpy==1.15.1
 Pillow==5.2.0
 pkg-resources==0.0.0
-protobuf==3.6.1
+protobuf==3.18.3
 pyparsing==2.2.0
 python-dateutil==2.7.3
 pytz==2018.5
diff --git a/requirements_with_extras.txt b/requirements_with_extras.txt
index 474f45f..ec6002c 100644
--- a/requirements_with_extras.txt
+++ b/requirements_with_extras.txt
@@ -22,7 +22,7 @@ pickleshare==0.7.4
 Pillow==5.2.0
 pkg-resources==0.0.0
 prompt-toolkit==1.0.15
-protobuf==3.6.0
+protobuf==3.18.3
 ptyprocess==0.6.0
 Pygments==2.2.0
 pyparsing==2.2.0