diff --git a/audio/requirements.txt b/audio/requirements.txt
index 388ef14..8992c62 100644
--- a/audio/requirements.txt
+++ b/audio/requirements.txt
@@ -36,7 +36,7 @@ onnx==1.7.0
 opt-einsum==3.2.1
 packaging==20.3
 Pillow==7.1.2
-protobuf==3.11.3
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 PyAudio==0.2.11