diff --git a/training_glens/hairColorClassification/src/docker/requirements.txt b/training_glens/hairColorClassification/src/docker/requirements.txt
index f8adbbe..907fbdc 100644
--- a/training_glens/hairColorClassification/src/docker/requirements.txt
+++ b/training_glens/hairColorClassification/src/docker/requirements.txt
@@ -32,7 +32,7 @@ packaging==19.2
 pandas==0.25.3
 parso==0.6.0
 Pillow==6.2.1
-protobuf==3.11.3
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pycrypto==2.6.1