diff --git a/src/004-types-of-property-are-incompatible.solution.1.ts b/src/004-types-of-property-are-incompatible.solution.1.ts
index 665ca66..b2abd1f 100644
--- a/src/004-types-of-property-are-incompatible.solution.1.ts
+++ b/src/004-types-of-property-are-incompatible.solution.1.ts
@@ -1,7 +1,7 @@
 const createRoutes = (config: {
   routes: {
     path: string;
-    component: string;
+    component: string | number;
   }[];
 }) => {};
 
diff --git a/src/004-types-of-property-are-incompatible.solution.2.ts b/src/004-types-of-property-are-incompatible.solution.2.ts
index ffd34d3..946be06 100644
--- a/src/004-types-of-property-are-incompatible.solution.2.ts
+++ b/src/004-types-of-property-are-incompatible.solution.2.ts
@@ -1,7 +1,7 @@
 type RoutingConfig = {
   routes: {
     path: string;
-    component: string;
+    component: string | number;
   }[];
 };
 
diff --git a/src/004-types-of-property-are-incompatible.solution.3.ts b/src/004-types-of-property-are-incompatible.solution.3.ts
index d52afd9..75927ae 100644
--- a/src/004-types-of-property-are-incompatible.solution.3.ts
+++ b/src/004-types-of-property-are-incompatible.solution.3.ts
@@ -1,7 +1,7 @@
 type RoutingConfig = {
   routes: {
     path: string;
-    component: string;
+    component: string | number;
   }[];
 };