diff --git a/dev-requirements.txt b/dev-requirements.txt
index ed6fde3..162e452 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -7,5 +7,5 @@ pytz==2020.1
 PyYAML==5.4
 six==1.15.0
 sqlparse==0.3.1
-protobuf==3.13.0
+protobuf==3.18.3
 tflite-runtime==2.1.0.post1
diff --git a/requirements.txt b/requirements.txt
index 9e7986f..2443335 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,6 @@ pytz==2020.1
 PyYAML==5.4
 six==1.15.0
 sqlparse==0.3.1
-protobuf==3.13.0
+protobuf==3.18.3
 tflite-runtime==2.1.0.post1
 picamera==1.13