diff --git a/requirements.txt b/requirements.txt
index 5ea5e9a..a466670 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ cryptography==2.8
 seaborn==0.9.0
 pyOpenSSL==19.0.0
 brotli==1.0.7
-protobuf==3.11.3
+protobuf==3.18.3
 ipaddr==2.2.0
 mock==3.0.5
 ordereddict==1.1
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 5ea5e9a..a466670 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -9,7 +9,7 @@ cryptography==2.8
 seaborn==0.9.0
 pyOpenSSL==19.0.0
 brotli==1.0.7
-protobuf==3.11.3
+protobuf==3.18.3
 ipaddr==2.2.0
 mock==3.0.5
 ordereddict==1.1
diff --git a/requirements/prod.txt b/requirements/prod.txt
index 5ea5e9a..a466670 100644
--- a/requirements/prod.txt
+++ b/requirements/prod.txt
@@ -9,7 +9,7 @@ cryptography==2.8
 seaborn==0.9.0
 pyOpenSSL==19.0.0
 brotli==1.0.7
-protobuf==3.11.3
+protobuf==3.18.3
 ipaddr==2.2.0
 mock==3.0.5
 ordereddict==1.1
diff --git a/requirements/test.txt b/requirements/test.txt
index 5ea5e9a..a466670 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -9,7 +9,7 @@ cryptography==2.8
 seaborn==0.9.0
 pyOpenSSL==19.0.0
 brotli==1.0.7
-protobuf==3.11.3
+protobuf==3.18.3
 ipaddr==2.2.0
 mock==3.0.5
 ordereddict==1.1
diff --git a/setup.py b/setup.py
index 84c3e4c..0f3b27d 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@
     "seaborn==0.9.0",
     "pyOpenSSL==19.0.0",
     "brotli==1.0.7",
-    "protobuf==3.9.0",
+    "protobuf==3.18.3",
     "ipaddr==2.2.0",
     "mock==3.0.5",
     "ordereddict==1.1",