diff --git a/src/app/components/Form/NumberField.vue b/src/app/components/Form/NumberField.vue
index 07ad5872..23f5c21f 100644
--- a/src/app/components/Form/NumberField.vue
+++ b/src/app/components/Form/NumberField.vue
@@ -13,5 +13,5 @@
 <script lang="ts" setup>
 defineProps<{ id: string; label: string; description?: string }>();
 
-const data = defineModel<number>();
+const data = defineModel<number | null>();
 </script>
diff --git a/src/app/components/Form/TextField.vue b/src/app/components/Form/TextField.vue
index e62de448..1bf6d26a 100644
--- a/src/app/components/Form/TextField.vue
+++ b/src/app/components/Form/TextField.vue
@@ -26,5 +26,5 @@ defineProps<{
   disabled?: boolean;
 }>();
 
-const data = defineModel<string>();
+const data = defineModel<string | null>();
 </script>
diff --git a/src/server/utils/WireGuard.ts b/src/server/utils/WireGuard.ts
index 0a4a57d8..2da26fce 100644
--- a/src/server/utils/WireGuard.ts
+++ b/src/server/utils/WireGuard.ts
@@ -209,10 +209,10 @@ class WireGuard {
       }
       const [h1, h2, h3, h4] = Array.from(headers);
 
-      wgInterface.h1 = h1;
-      wgInterface.h2 = h2;
-      wgInterface.h3 = h3;
-      wgInterface.h4 = h4;
+      wgInterface.h1 = h1!;
+      wgInterface.h2 = h2!;
+      wgInterface.h3 = h3!;
+      wgInterface.h4 = h4!;
 
       Database.interfaces.update(wgInterface);
     }