diff --git a/src/zap.ts b/src/zap.ts
index d631763..07cae3b 100644
--- a/src/zap.ts
+++ b/src/zap.ts
@@ -326,17 +326,17 @@ export function fromRequest<Fn extends (req: ServerRequest, ...rest: any[]) => a
 export type RouteParams<T extends string> = T extends `${string}:${infer P}?/${infer Rest}`
   ? {[K in P]?: string} & RouteParams<Rest>
   : T extends `${string}:${infer P}*/${infer Rest}`
-  ? {[K in P]?: string} & RouteParams<Rest>
+  ? {[K in P]?: string[]} & RouteParams<Rest>
   : T extends `${string}:${infer P}+/${infer Rest}`
-  ? {[K in P]: string} & RouteParams<Rest>
+  ? {[K in P]: string[]} & RouteParams<Rest>
   : T extends `${string}:${infer P}/${infer Rest}`
   ? {[K in P]: string} & RouteParams<Rest>
   : T extends `${string}:${infer P}?`
   ? {[K in P]?: string}
   : T extends `${string}:${infer P}*`
-  ? {[K in P]?: string}
+  ? {[K in P]?: string[]}
   : T extends `${string}:${infer P}+`
-  ? {[K in P]: string}
+  ? {[K in P]: string[]}
   : T extends `${string}:${infer P}`
   ? {[K in P]: string}
   : {}