diff --git a/scripts/install b/scripts/install
index f068e36..100e260 100644
--- a/scripts/install
+++ b/scripts/install
@@ -62,7 +62,7 @@ ynh_script_progression --message="Installing dependencies..."
 ynh_install_app_dependencies postgresql apt-transport-https
 
 # Install Yarn
-ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn (<1.20)" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"
+ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn(<1.20)" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"
 
 ynh_install_nodejs 8