diff --git a/scripts/upgrade b/scripts/upgrade
index 9ce5778..a81ce93 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -87,7 +87,7 @@ ynh_add_fpm_config --package="$extra_php_dependencies"
 ynh_script_progression --message="Upgrading Composer..." --weight=1
 
 # Upgrade composer itself
-ynh_install_composer --phpversion=$phpversion --workdir=$final_path --install_args="--prefer-source --no-dev"
+ynh_install_composer --phpversion=${phpversion} --workdir=$final_path --install_args="--prefer-source --no-dev"
 
 #=================================================
 # MODIFY A CONFIG FILE