diff --git a/requirements.txt b/requirements.txt
index 4da2cb5..83be948 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ networkx==2.2
 numpy==1.15.4
 opencv-python==3.4.4.19
 Pillow==8.2.0
-protobuf==3.6.1
+protobuf==3.18.3
 pyparsing==2.3.0
 python-dateutil==2.7.5
 PyWavelets==1.0.1