diff --git a/.changeset/ninety-squids-appear.md b/.changeset/ninety-squids-appear.md
new file mode 100644
index 00000000000..7a8e0b4e07d
--- /dev/null
+++ b/.changeset/ninety-squids-appear.md
@@ -0,0 +1,5 @@
+---
+"@clerk/astro": patch
+---
+
+Allow the handler of `clerkMiddleware` to return undefined. When undefined is returned, `clerkMiddleware` implicitly calls `await next()`.
diff --git a/packages/astro/src/server/clerk-middleware.ts b/packages/astro/src/server/clerk-middleware.ts
index a1e4f90825e..d15c6d1b122 100644
--- a/packages/astro/src/server/clerk-middleware.ts
+++ b/packages/astro/src/server/clerk-middleware.ts
@@ -40,7 +40,7 @@ type ClerkAstroMiddlewareHandler = (
   auth: () => ClerkMiddlewareAuthObject,
   context: AstroMiddlewareContextParam,
   next: AstroMiddlewareNextParam,
-) => AstroMiddlewareReturn;
+) => AstroMiddlewareReturn | undefined;
 
 type ClerkAstroMiddlewareOptions = AuthenticateRequestOptions;