diff --git a/requirements-ace.txt b/requirements-ace.txt
index b9390f9..de7b1e8 100644
--- a/requirements-ace.txt
+++ b/requirements-ace.txt
@@ -1,4 +1,4 @@
-protobuf==3.6.0
+protobuf==3.18.3
 six==1.11.0
 tensorboard==1.10.0
 tensorflow-gpu==1.10.0
diff --git a/requirements.txt b/requirements.txt
index dd47427..faf9ea2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ MarkupSafe==1.0
 matplotlib==2.2.2
 numpy==1.14.2
 pandas==0.22.0
-protobuf==3.6.0
+protobuf==3.18.3
 PyAudio==0.2.11
 pydub==0.20.0
 pyparsing==2.2.0