diff --git a/src/lib/components/widget/integration/IntegrationWidget.svelte b/src/lib/components/widget/integration/IntegrationWidget.svelte
index d9f2400..ac95074 100644
--- a/src/lib/components/widget/integration/IntegrationWidget.svelte
+++ b/src/lib/components/widget/integration/IntegrationWidget.svelte
@@ -5,7 +5,15 @@
 	import ProgressRenderer from './ProgressRenderer.svelte';
 	import AlertBannerRenderer from './AlertBannerRenderer.svelte';
 	import ChartRenderer from './ChartRenderer.svelte';
-	import type { IntegrationData } from '$lib/server/integrations/types.js';
+	import type {
+		IntegrationData,
+		StatCardData,
+		GaugeData,
+		ListData,
+		ProgressData,
+		AlertBannerData,
+		ChartData
+	} from '$lib/server/integrations/types.js';
 
 	interface Props {
 		config: {
@@ -61,17 +69,17 @@
 	</div>
 {:else if integrationData}
 	{#if integrationData.renderer === 'stat-card'}
-		<StatCardRenderer data={integrationData.data} />
+		<StatCardRenderer data={integrationData.data as StatCardData} />
 	{:else if integrationData.renderer === 'gauge'}
-		<GaugeRenderer data={integrationData.data} />
+		<GaugeRenderer data={integrationData.data as GaugeData} />
 	{:else if integrationData.renderer === 'list'}
-		<ListRenderer data={integrationData.data} />
+		<ListRenderer data={integrationData.data as ListData} />
 	{:else if integrationData.renderer === 'progress'}
-		<ProgressRenderer data={integrationData.data} />
+		<ProgressRenderer data={integrationData.data as ProgressData} />
 	{:else if integrationData.renderer === 'alert-banner'}
-		<AlertBannerRenderer data={integrationData.data} />
+		<AlertBannerRenderer data={integrationData.data as AlertBannerData} />
 	{:else if integrationData.renderer === 'chart'}
-		<ChartRenderer data={integrationData.data} />
+		<ChartRenderer data={integrationData.data as ChartData} />
 	{:else}
 		<div class="p-4 text-sm text-muted-foreground">Unknown renderer: {integrationData.renderer}</div>
 	{/if}
diff --git a/src/lib/server/services/appService.ts b/src/lib/server/services/appService.ts
index 6defeeb..2269de5 100644
--- a/src/lib/server/services/appService.ts
+++ b/src/lib/server/services/appService.ts
@@ -2,10 +2,11 @@ import { prisma } from '../prisma.js';
 import type { CreateAppInput, UpdateAppInput } from '$lib/types/app.js';
 import { encrypt, tryDecrypt } from '../integrations/encryption.js';
 
-function decryptAppIntegration<T extends { integrationConfig: string | null }>(app: T): T {
+function decryptAppIntegration<T extends Record<string, unknown>>(app: T): T {
+	if (!('integrationConfig' in app) || !app.integrationConfig) return app;
 	return {
 		...app,
-		integrationConfig: tryDecrypt(app.integrationConfig)
+		integrationConfig: tryDecrypt(app.integrationConfig as string)
 	};
 }
 
diff --git a/src/lib/types/app.ts b/src/lib/types/app.ts
index b66c85e..b598e5f 100644
--- a/src/lib/types/app.ts
+++ b/src/lib/types/app.ts
@@ -35,8 +35,8 @@ export interface CreateAppInput {
 	readonly healthcheckMethod?: HealthcheckMethod;
 	readonly healthcheckExpectedStatus?: number;
 	readonly healthcheckTimeout?: number;
-	readonly integrationType?: string;
-	readonly integrationConfig?: string;
+	readonly integrationType?: string | null;
+	readonly integrationConfig?: string | null;
 	readonly integrationEnabled?: boolean;
 	readonly createdById?: string;
 }