diff --git a/requirements-python-3.7.4.txt b/requirements-python-3.7.4.txt
index faef22e..dbb3571 100644
--- a/requirements-python-3.7.4.txt
+++ b/requirements-python-3.7.4.txt
@@ -25,7 +25,7 @@ numpy==1.18.1
 oauthlib==3.1.0
 opencv-contrib-python==4.2.0.32
 opt-einsum==3.1.0
-protobuf==3.11.3
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pycosat==0.6.3
diff --git a/requirements.txt b/requirements.txt
index 37c71c1..145bf9f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ numpy==1.18.1
 oauthlib==3.1.0
 opencv-contrib-python==4.2.0.32
 opt-einsum==3.1.0
-protobuf==3.11.3
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 requests==2.23.0