diff --git a/themes/baggy/config.twig b/themes/baggy/config.twig
index 46735f074..e45c3218f 100755
--- a/themes/baggy/config.twig
+++ b/themes/baggy/config.twig
@@ -111,7 +111,7 @@
                 <fieldset class="w500p">
                     <div class="row">
                         <label class="col w150p" for="file">{% trans "File:" %}</label>
-                        <input class="col" type="file" id="file" name="file" tabindex="4">
+                        <input class="col" type="file" id="file" name="file" tabindex="4" required="required">
                     </div>
                     <div class="row mts txtcenter">
                         <button class="bouton" type="submit" tabindex="4">{% trans "Import" %}</button>
diff --git a/themes/default/config.twig b/themes/default/config.twig
index 160f6046a..8f047ae6a 100755
--- a/themes/default/config.twig
+++ b/themes/default/config.twig
@@ -110,7 +110,7 @@
                 <fieldset class="w500p">
                     <div class="row">
                         <label class="col w150p" for="file">{% trans "File:" %}</label>
-                        <input class="col" type="file" id="file" name="file" tabindex="4">
+                        <input class="col" type="file" id="file" name="file" tabindex="4" required="required">
                     </div>
                     <div class="row mts txtcenter">
                         <button class="bouton" type="submit" tabindex="4">{% trans "Import" %}</button>