diff --git a/backend/src/validation/workspace.ts b/backend/src/validation/workspace.ts
index 44044d923..e0f7c156b 100644
--- a/backend/src/validation/workspace.ts
+++ b/backend/src/validation/workspace.ts
@@ -270,7 +270,7 @@ export const ToggleAutoCapitalizationV2 = z.object({
     workspaceId: z.string().trim()
   }),
   body: z.object({
-    autoCapitalization: z.string().trim()
+    autoCapitalization: z.boolean()
   })
 });