diff --git a/kameleon/debian9-x64-ia-tutorial.yaml b/kameleon/debian9-x64-ia-tutorial.yaml
index 82f0afed231fdf8bc1b72ed057a43df90e396133..0a71784aba998b2dec89bb8c021b6aebfb745616 100644
--- a/kameleon/debian9-x64-ia-tutorial.yaml
+++ b/kameleon/debian9-x64-ia-tutorial.yaml
@@ -17,7 +17,7 @@ global:
   miniconda_dir: /opt/miniconda 
   # conda install command adapted to the installed python and cuda toolkit
   # versions
-  pytorch_conda_install_command: conda install pytorch torchvision cudatoolkit=9.0 -c pytorch
+  pytorch_conda_install_command: conda install -y pytorch torchvision cudatoolkit=9.0 -c pytorch
 
   # kameleon VM disk size
   image_size: 20G