diff --git a/hackathon/mBrainAligner/src/3D_U-Net/requirements.txt b/hackathon/mBrainAligner/src/3D_U-Net/requirements.txt
index aa561b32b9..c037d6fb66 100644
--- a/hackathon/mBrainAligner/src/3D_U-Net/requirements.txt
+++ b/hackathon/mBrainAligner/src/3D_U-Net/requirements.txt
@@ -54,7 +54,7 @@ SimpleITK==1.2.3
 six==1.11.0
 sklearn==0.0
 tables==3.4.0
-tensorflow-gpu==1.4.0
+tensorflow-gpu==2.5.1
 tensorflow-tensorboard==0.4.0rc2
 terminado==0.6
 testpath==0.3.1