diff --git a/requirements-cpu.txt b/requirements-cpu.txt
index 24d681d..6c28054 100644
--- a/requirements-cpu.txt
+++ b/requirements-cpu.txt
@@ -9,7 +9,7 @@ Keras-Preprocessing==1.0.5
 Markdown==3.0.1
 numpy==1.15.4
 pandas==0.24.2
-protobuf==3.6.1
+protobuf==3.15.0
 PyYAML==4.2b2
 scipy==1.1.0
 six==1.11.0
diff --git a/requirements.txt b/requirements.txt
index f51ccd8..e9a67e1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ Keras-Preprocessing==1.0.5
 Markdown==3.0.1
 numpy==1.15.4
 pandas==0.24.2
-protobuf==3.6.1
+protobuf==3.15.0
 PyYAML==3.13
 scipy==1.1.0
 six==1.11.0