diff --git a/apps/web/src/app/wait-list/schema.ts b/apps/web/src/app/wait-list/schema.ts
index c4a7294c..d176c74e 100644
--- a/apps/web/src/app/wait-list/schema.ts
+++ b/apps/web/src/app/wait-list/schema.ts
@@ -6,11 +6,15 @@ export const WAITLIST_EMAIL_TYPES = [
 ] as const;
 
 export const waitlistSubmissionSchema = z.object({
-  domain: z
-    .string({ required_error: "Domain is required" })
-    .trim()
-    .min(1, "Domain is required")
-    .max(255, "Domain must be 255 characters or fewer"),
+ domain: z
+  .string({ required_error: "Domain is required" })
+  .trim()
+  .min(1, "Domain is required")
+  .max(255, "Domain must be 255 characters or fewer")
+  .regex(
+    /^(?!:\/\/)([a-zA-Z0-9-]+\.)+[a-zA-Z]{2,}$/,
+    "Please enter a valid domain (e.g. example.com)"
+  ),
   emailTypes: z
     .array(z.enum(WAITLIST_EMAIL_TYPES))
     .min(1, "Select at least one email type"),