diff --git a/scripts/install b/scripts/install
index 88c32ef..2b98cf0 100755
--- a/scripts/install
+++ b/scripts/install
@@ -132,9 +132,11 @@ cp "$install_dir/build/server-ce/config/custom-environment-variables.json" "$ins
 
 ynh_secure_remove --file="$install_dir/build"
 
-ynh_script_progression --message="Building app..."
+ynh_script_progression --message="Building app... This may take a LOT of time depending of your CPU" --weight=25
 pushd "$install_dir/live"
 	ynh_use_nodejs
+	ynh_exec_warn_less npm cache clean --force
+	ynh_exec_warn_less npm install
    	ynh_exec_warn_less npm ci
 popd
 
diff --git a/scripts/upgrade b/scripts/upgrade
index 38c9358..6ac7be2 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -153,7 +153,8 @@ cp "$install_dir/build/server-ce/config/custom-environment-variables.json" "$ins
 ynh_script_progression --message="Building app... This may take a LOT of time depending of your CPU" --weight=25
 pushd "$install_dir/live"
 	ynh_use_nodejs
-        ynh_exec_warn_less npm install
+	ynh_exec_warn_less npm cache clean --force
+    ynh_exec_warn_less npm install
    	ynh_exec_warn_less npm ci
 popd