diff --git a/python/requirements.txt b/python/requirements.txt
old mode 100755
new mode 100644
index a30e841..22293ad
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -1,5 +1,5 @@
 grpcio==1.38.1
 grpcio-tools==1.38.1
-protobuf==3.18.1
+protobuf==3.18.3
 numpy==1.19.5
 sounddevice==0.4.1
\ No newline at end of file
diff --git a/python/requirements_python_3.5.txt b/python/requirements_python_3.5.txt
index d330941..cad718e 100644
--- a/python/requirements_python_3.5.txt
+++ b/python/requirements_python_3.5.txt
@@ -1,5 +1,5 @@
 grpcio==1.38.1
 grpcio-tools==1.38.1
-protobuf==3.15.8
+protobuf==3.18.3
 numpy==1.18.5
 sounddevice==0.4.1
\ No newline at end of file