diff --git a/scripts/install b/scripts/install
index b68ac2a..4516549 100755
--- a/scripts/install
+++ b/scripts/install
@@ -263,7 +263,7 @@ chown -R "$app":"$app" "$final_path"
 
 pushd $final_path/$app
 	#Generate key pair
-    sudo -u "$app" MIX_ENV=prod mix web_push.gen.keypair >> "config/prod.secret.web_push.exs"
+    sudo -u "$app" mix web_push.gen.keypair >> "config/prod.secret.web_push.exs"
 	ynh_replace_string "administrator@example.com" "$admin_email" "$final_path/$app/config/prod.secret.web_push.exs" 
 	
     # App setup and db migration
diff --git a/scripts/upgrade b/scripts/upgrade
index b00a9e4..63db32c 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -210,7 +210,7 @@ pushd $final_path/$app
 	if [ ! -f "$final_path/$app/config/prod.secret.web_push.exs" ]
 	then
 		#Generate key pair
-	    sudo -u "$app" MIX_ENV=prod mix web_push.gen.keypair >> "config/prod.secret.web_push.exs"
+	    sudo -u "$app" mix web_push.gen.keypair >> "config/prod.secret.web_push.exs"
 		ynh_replace_string "administrator@example.com" "$admin_email" "$final_path/$app/config/prod.secret.web_push.exs" 
 	fi
     sudo -u "$app" MIX_ENV=prod mix deps.get