diff --git a/ML/requirements.txt b/ML/requirements.txt
index ad766670..f27b7f47 100644
--- a/ML/requirements.txt
+++ b/ML/requirements.txt
@@ -9,7 +9,7 @@ Keras-Preprocessing==1.1.0
 Markdown==3.1.1
 numpy==1.16.4
 Pillow==6.1.0
-protobuf==3.8.0
+protobuf==3.15.0
 six==1.12.0
 tb-nightly==1.14.0a20190603
 termcolor==1.1.0
diff --git a/ML/requirements2.txt b/ML/requirements2.txt
index 5858afaf..31fd5881 100644
--- a/ML/requirements2.txt
+++ b/ML/requirements2.txt
@@ -12,7 +12,7 @@ Markdown==3.1.1
 numpy==1.16.4
 opencv-python==4.1.0.25
 Pillow==6.1.0
-protobuf==3.8.0
+protobuf==3.15.0
 PyYAML==5.1.2
 scipy==1.3.1
 six==1.12.0
diff --git a/ML/requirements3.txt b/ML/requirements3.txt
index 4cc4932f..a43dffe0 100644
--- a/ML/requirements3.txt
+++ b/ML/requirements3.txt
@@ -77,7 +77,7 @@ pickleshare==0.7.5
 Pillow==5.1.0
 prometheus-client==0.7.1
 prompt-toolkit==2.0.9
-protobuf==3.6.1
+protobuf==3.15.0
 psutil==5.4.2
 ptyprocess==0.6.0
 pyasn1==0.4.5