diff --git a/packages/backend/src/modules/app-lifecycle/dto/app-lifecycle.dto.ts b/packages/backend/src/modules/app-lifecycle/dto/app-lifecycle.dto.ts
index 2068081172..3621c16684 100644
--- a/packages/backend/src/modules/app-lifecycle/dto/app-lifecycle.dto.ts
+++ b/packages/backend/src/modules/app-lifecycle/dto/app-lifecycle.dto.ts
@@ -3,7 +3,7 @@ import { z } from 'zod';
 
 export const appFormSchema = z
   .object({
-    port: z.coerce.number().optional(),
+    port: z.coerce.number().min(1024).max(65535).optional(),
     exposed: z.boolean().optional(),
     exposedLocal: z.boolean().optional(),
     openPort: z.boolean().optional().default(true),
@@ -13,16 +13,7 @@ export const appFormSchema = z
   .extend({})
   .catchall(z.unknown());
 
-export class AppFormBody extends createZodDto(
-  z.object({
-    port: z.string().optional(),
-    exposed: z.boolean().optional(),
-    exposedLocal: z.boolean().optional(),
-    openPort: z.boolean().optional(),
-    domain: z.string().optional(),
-    isVisibleOnGuestDashboard: z.boolean().optional(),
-  }),
-) {}
+export class AppFormBody extends createZodDto(appFormSchema) {}
 
 export class UninstallAppBody extends createZodDto(z.object({ removeBackups: z.boolean() })) {}
 
diff --git a/packages/backend/src/swagger.json b/packages/backend/src/swagger.json
index 1f5fc6501d..1780743622 100644
--- a/packages/backend/src/swagger.json
+++ b/packages/backend/src/swagger.json
@@ -2994,7 +2994,11 @@
         "type": "object",
         "properties": {
           "port": {
-            "type": "string"
+            "type": "number",
+            "minimum": 1024,
+            "exclusiveMinimum": false,
+            "maximum": 65535,
+            "exclusiveMaximum": false
           },
           "exposed": {
             "type": "boolean"
@@ -3003,7 +3007,8 @@
             "type": "boolean"
           },
           "openPort": {
-            "type": "boolean"
+            "type": "boolean",
+            "default": true
           },
           "domain": {
             "type": "string"
diff --git a/packages/frontend/src/api-client/types.gen.ts b/packages/frontend/src/api-client/types.gen.ts
index 7194694711..4af274c873 100644
--- a/packages/frontend/src/api-client/types.gen.ts
+++ b/packages/frontend/src/api-client/types.gen.ts
@@ -77,7 +77,7 @@ export type AppContextDto = {
 };
 
 export type AppFormBody = {
-  port?: string;
+  port?: number;
   exposed?: boolean;
   exposedLocal?: boolean;
   openPort?: boolean;
diff --git a/packages/frontend/src/modules/app/components/dialogs/install-dialog/install-dialog.tsx b/packages/frontend/src/modules/app/components/dialogs/install-dialog/install-dialog.tsx
index 2209d0b203..a8394767d0 100644
--- a/packages/frontend/src/modules/app/components/dialogs/install-dialog/install-dialog.tsx
+++ b/packages/frontend/src/modules/app/components/dialogs/install-dialog/install-dialog.tsx
@@ -10,7 +10,7 @@ import { useId } from 'react';
 import toast from 'react-hot-toast';
 import { useTranslation } from 'react-i18next';
 import { InstallFormButtons } from '../../install-form-buttons/install-form-buttons';
-import { InstallForm } from '../../install-form/install-form';
+import { type FormValues, InstallForm } from '../../install-form/install-form';
 
 interface IProps {
   info: AppInfo;
@@ -34,6 +34,13 @@ export const InstallDialog: React.FC<IProps> = ({ info, isOpen, onClose }) => {
     },
   });
 
+  const normalizeFormValues = (values: FormValues) => {
+    return {
+      ...values,
+      port: values.port ? Number(values.port) : undefined,
+    };
+  };
+
   return (
     <Dialog open={isOpen} onOpenChange={onClose}>
       <DialogContent>
@@ -43,7 +50,7 @@ export const InstallDialog: React.FC<IProps> = ({ info, isOpen, onClose }) => {
         <ScrollArea maxheight={500}>
           <DialogDescription>
             <InstallForm
-              onSubmit={(data) => installMutation.mutate({ path: { urn: info.urn }, body: data })}
+              onSubmit={(data) => installMutation.mutate({ path: { urn: info.urn }, body: normalizeFormValues(data) })}
               formFields={info.form_fields}
               info={info}
               formId={formId}
diff --git a/packages/frontend/src/modules/app/components/dialogs/update-settings-dialog/update-settings-dialog.tsx b/packages/frontend/src/modules/app/components/dialogs/update-settings-dialog/update-settings-dialog.tsx
index 7f23371ea9..c30987f5fb 100644
--- a/packages/frontend/src/modules/app/components/dialogs/update-settings-dialog/update-settings-dialog.tsx
+++ b/packages/frontend/src/modules/app/components/dialogs/update-settings-dialog/update-settings-dialog.tsx
@@ -37,6 +37,13 @@ export const UpdateSettingsDialog: React.FC<IProps> = ({ info, config, isOpen, o
     },
   });
 
+  const normalizeFormValues = (values: FormValues) => {
+    return {
+      ...values,
+      port: values.port ? Number(values.port) : undefined,
+    };
+  };
+
   return (
     <Dialog open={isOpen} onOpenChange={onClose}>
       <DialogContent>
@@ -46,7 +53,7 @@ export const UpdateSettingsDialog: React.FC<IProps> = ({ info, config, isOpen, o
         <ScrollArea maxheight={500}>
           <DialogDescription>
             <InstallForm
-              onSubmit={(values: FormValues) => updateConfig.mutate({ path: { urn: info.urn }, body: values })}
+              onSubmit={(values: FormValues) => updateConfig.mutate({ path: { urn: info.urn }, body: normalizeFormValues(values) })}
               formFields={info.form_fields}
               info={info}
               initialValues={{ ...config }}