diff --git a/scripts/install b/scripts/install
index 5d2ef93..b5f4029 100644
--- a/scripts/install
+++ b/scripts/install
@@ -119,7 +119,7 @@ chown -R :mumble-server "$final_path"
 # Add user to ssl-cert so it can read certificates
 #=================================================
 
-ynh_exec_warn_less usermod --append --groups ssl-cert mumble-server
+usermod --append --groups ssl-cert mumble-server
 
 #=================================================
 # Set SuperUser password
diff --git a/scripts/restore b/scripts/restore
index 339b6c4..6aeb760 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -64,7 +64,7 @@ chown -R :mumble-server "$final_path"
 # Add user to ssl-cert so it can read certificates
 #=================================================
 
-ynh_exec_warn_less usermod --append --groups ssl-cert mumble-server
+usermod --append --groups ssl-cert mumble-server
 
 #=================================================
 # Disable default server installed by Debian's package
diff --git a/scripts/upgrade b/scripts/upgrade
index d4b95c5..a045d9c 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -168,7 +168,7 @@ chown -R :mumble-server "$final_path"
 # Add user to ssl-cert so it can read certificates
 #=================================================
 
-ynh_exec_warn_less usermod --append --groups ssl-cert mumble-server
+usermod --append --groups ssl-cert mumble-server
 
 #=================================================
 # Set SuperUser password