diff --git a/src/schemas/any.ts b/src/schemas/any.ts
index 000eba4..bd7cec8 100644
--- a/src/schemas/any.ts
+++ b/src/schemas/any.ts
@@ -5,24 +5,11 @@ import * as v0_2 from "./0.2.js";
 import * as v0_3 from "./0.3.js";
 
 /**
- * Union schema that accepts any supported manifest version.
- * Uses preprocessing to normalize dxt_version to manifest_version,
- * then efficiently discriminates based on the now-required manifest_version field.
+ * Union schema that accepts any supported manifest version (0.1, 0.2, 0.3).
+ * Use this when you need to validate manifests of any version.
  */
-export const McpbManifestSchema = z.preprocess(
-  (val) => {
-    // Normalize: if it has dxt_version, ensure manifest_version is also set
-    if (val && typeof val === "object" && "dxt_version" in val) {
-      const obj = val as Record<string, unknown>;
-      if (!obj.manifest_version && obj.dxt_version) {
-        return { ...obj, manifest_version: obj.dxt_version };
-      }
-    }
-    return val;
-  },
-  z.union([
-    v0_1.McpbManifestSchema,
-    v0_2.McpbManifestSchema,
-    v0_3.McpbManifestSchema,
-  ]),
-);
+export const McpbManifestSchema = z.union([
+  v0_1.McpbManifestSchema,
+  v0_2.McpbManifestSchema,
+  v0_3.McpbManifestSchema,
+]);
diff --git a/src/types.ts b/src/types.ts
index e6ba766..9fb510f 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1,6 +1,6 @@
 import type * as z from "zod";
 
-import type { McpbManifestSchema as McpbManifestSchema_vAny } from "./schemas/any.js";
+import type { McpbManifestSchema as McpbManifestSchemaAny } from "./schemas/any.js";
 import type {
   McpbManifestAuthorSchema,
   McpbManifestCompatibilitySchema,
@@ -51,7 +51,7 @@ export type McpbUserConfigValues = z.infer<typeof McpbUserConfigValuesSchema>;
  * McpbManifest type that accepts any supported manifest version
  * This is the default manifest type that should be used for maximum compatibility.
  */
-export type McpbManifestAny = z.infer<typeof McpbManifestSchema_vAny>;
+export type McpbManifest = z.infer<typeof McpbManifestSchemaAny>;
 
 /**
  * McpbManifest type for the latest manifest version only
@@ -59,12 +59,6 @@ export type McpbManifestAny = z.infer<typeof McpbManifestSchema_vAny>;
  */
 export type McpbManifestLatest = z.infer<typeof McpbManifestSchema>;
 
-/**
- * @deprecated Use McpbManifestAny instead
- * Default manifest type that accepts any supported version
- */
-export type McpbManifest = McpbManifestAny;
-
 /**
  * Information about a MCPB package signature
  */