diff --git a/contract/hooks.go b/contract/hooks.go
index 3c8aaf7..86431ba 100644
--- a/contract/hooks.go
+++ b/contract/hooks.go
@@ -14,17 +14,17 @@ var HooksKey = hooksKey{}
 // AfterResponseHook is a callback invoked after the full HTTP response
 // has been written. It receives the error returned by the handler,
 // which may be nil if the handler succeeded.
-type AfterResponseHook func(err error)
+type AfterResponseHook = func(err error)
 
 // BeforeWriteHeaderHook is a callback invoked just before the
 // response status code is written. It receives the response writer
 // and the status code that is about to be sent.
-type BeforeWriteHeaderHook func(w http.ResponseWriter, status int)
+type BeforeWriteHeaderHook = func(w http.ResponseWriter, status int)
 
 // BeforeWriteHook is a callback invoked just before response body
 // bytes are written. It receives the response writer and the byte
 // slice that is about to be sent.
-type BeforeWriteHook func(w http.ResponseWriter, content []byte)
+type BeforeWriteHook = func(w http.ResponseWriter, content []byte)
 
 // Hooks defines the contract for registering and retrieving
 // lifecycle callbacks during HTTP request processing. Middleware