diff --git a/scripts/install b/scripts/install
index a22963d..b597a39 100644
--- a/scripts/install
+++ b/scripts/install
@@ -135,13 +135,13 @@ ynh_script_progression --message="Installing composer dependencies..." --weight=
 ynh_exec_warn_less ynh_install_composer --user=$app --phpversion="$phpversion" --workdir="$final_path"
 
 # Set Flarum version
-ynh_exec_warn_less ynh_composer_exec --user=$app --phpversion=$phpversion --workdir=$final_path --commands="require flarum/core:$core_version --prefer-lowest --no-update"
+ynh_exec_warn_less ynh_composer_exec --user=$app --phpversion=$phpversion --workdir=$final_path --commands=\"require flarum/core:$core_version --prefer-lowest --no-update\"
 
 # Require SSOwat extension
-ynh_exec_warn_less ynh_composer_exec --user=$app --phpversion=$phpversion --workdir=$final_path --commands="require tituspijean/flarum-ext-auth-ssowat:$ssowat_version --no-update"
+ynh_exec_warn_less ynh_composer_exec --user=$app --phpversion=$phpversion --workdir=$final_path --commands=\"require tituspijean/flarum-ext-auth-ssowat:$ssowat_version --no-update\"
 
 # Update and download dependencies
-ynh_exec_warn_less ynh_composer_exec --user=$app --phpversion=$phpversion --workdir=$final_path --commands="update"
+ynh_exec_warn_less ynh_composer_exec --user=$app --phpversion=$phpversion --workdir=$final_path --commands=\"update\"
 
 #=================================================
 # FLARUM POST-INSTALL
diff --git a/scripts/upgrade b/scripts/upgrade
index 53b0ec8..2c87852 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -199,8 +199,8 @@ then
 	# Perform migrations and clear cache
 	pushd $final_path
 		ynh_script_progression --message="Upgrading Flarum and its extensions..." --weight=1
-		ynh_exec_warn_less ynh_composer_exec --user=$app --phpversion=$phpversion --workdir=$final_path --commands="require tituspijean/flarum-ext-auth-ssowat:$ssowat_version --no-update"
-		ynh_exec_warn_less ynh_composer_exec --user=$app --phpversion=$phpversion --workdir=$final_path --commands="require flarum/core:$core_version --prefer-dist --update-no-dev -a --update-with-all-dependencies"
+		ynh_exec_warn_less ynh_composer_exec --user=$app --phpversion=$phpversion --workdir=$final_path --commands=\"require tituspijean/flarum-ext-auth-ssowat:$ssowat_version --no-update\"
+		ynh_exec_warn_less ynh_composer_exec --user=$app --phpversion=$phpversion --workdir=$final_path --commands=\"require flarum/core:$core_version --prefer-dist --update-no-dev -a --update-with-all-dependencies\"
 		exec_as $app php$phpversion flarum migrate
 		exec_as $app php$phpversion flarum cache:clear
 	popd