diff --git a/.changeset/wild-poets-argue.md b/.changeset/wild-poets-argue.md
new file mode 100644
index 00000000..23e07476
--- /dev/null
+++ b/.changeset/wild-poets-argue.md
@@ -0,0 +1,5 @@
+---
+'@hono/zod-openapi': patch
+---
+
+fix: relax input types
diff --git a/packages/zod-openapi/src/index.ts b/packages/zod-openapi/src/index.ts
index ce38933d..67be1364 100644
--- a/packages/zod-openapi/src/index.ts
+++ b/packages/zod-openapi/src/index.ts
@@ -63,7 +63,7 @@ type InputTypeBase<
 > = R['request'] extends RequestTypes
   ? RequestPart<R, Part> extends AnyZodObject
     ? {
-        in: { [K in Type]: z.input<RequestPart<R, Part>> }
+        in: { [K in Type]: z.infer<RequestPart<R, Part>> }
         out: { [K in Type]: z.output<RequestPart<R, Part>> }
       }
     : {}
@@ -77,7 +77,7 @@ type InputTypeJson<R extends RouteConfig> = R['request'] extends RequestTypes
         : R['request']['body']['content'][keyof R['request']['body']['content']]['schema'] extends ZodSchema<any>
         ? {
             in: {
-              json: z.input<
+              json: z.infer<
                 R['request']['body']['content'][keyof R['request']['body']['content']]['schema']
               >
             }
@@ -100,7 +100,7 @@ type InputTypeForm<R extends RouteConfig> = R['request'] extends RequestTypes
         : R['request']['body']['content'][keyof R['request']['body']['content']]['schema'] extends ZodSchema<any>
         ? {
             in: {
-              form: z.input<
+              form: z.infer<
                 R['request']['body']['content'][keyof R['request']['body']['content']]['schema']
               >
             }