diff --git a/scripts/install b/scripts/install
index f8017b4..c704c1e 100644
--- a/scripts/install
+++ b/scripts/install
@@ -50,7 +50,7 @@ ynh_config_add_phpfpm
 ynh_script_progression "Installing Roundcube with Composer..."
 
 # Install composer.json
-cp "$install_dir/composer.json-dist" "$install_dir/composer.json"
+cp -a "$install_dir/composer.json-dist" "$install_dir/composer.json"
 
 # Install composer
 ynh_composer_install
diff --git a/scripts/upgrade b/scripts/upgrade
index 3cf675f..d0bd0e9 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -90,7 +90,7 @@ then
 
     # Upgrade composer itself
     ynh_composer_install
-ynh_composer_exec install --no-dev
+    ynh_composer_exec install --no-dev
 
     # Check if dependencies need to be updated with Composer
     if [ -f "$install_dir/composer.json" ]
@@ -100,7 +100,7 @@ ynh_composer_exec install --no-dev
         ynh_composer_exec require roundcube/plugin-installer:>=0.2.0
     else
         # Install composer.json
-        cp "$install_dir/composer.json-dist" "$install_dir/composer.json"
+        cp -a "$install_dir/composer.json-dist" "$install_dir/composer.json"
     fi
 
     #=================================================