diff --git a/requirements.txt b/requirements.txt
index 5023807..88ec3b6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ numpy==1.18.4
 onnx==1.7.0
 onnxruntime-gpu==1.3.0
 Pillow==7.1.2
-protobuf==3.12.1
+protobuf==3.15.0
 pyparsing==2.4.7
 python-dateutil==2.8.1
 PyWavelets==1.1.1