diff --git a/api.go b/api.go
index d6f507f..52d4577 100644
--- a/api.go
+++ b/api.go
@@ -71,12 +71,12 @@ func NotFound(message string, args ...interface{}) Error {
 	if message == "" {
 		message = "Not found"
 	}
-	return New(http.StatusNotFound, fmt.Sprintf(message, args...))
+	return New(http.StatusNotFound, message, args...)
 }
 
 // NotImplemented creates a new not implemented error
 func NotImplemented(message string) Error {
-	return New(http.StatusNotImplemented, message)
+	return New(http.StatusNotImplemented, "%s", message)
 }
 
 // MethodNotAllowedError represents an error for when the path matches but the method doesn't
@@ -179,7 +179,7 @@ func ServeError(rw http.ResponseWriter, r *http.Request, err error) {
 	default:
 		rw.WriteHeader(http.StatusInternalServerError)
 		if r == nil || r.Method != http.MethodHead {
-			_, _ = rw.Write(errorAsJSON(New(http.StatusInternalServerError, err.Error())))
+			_, _ = rw.Write(errorAsJSON(New(http.StatusInternalServerError, "%v", err)))
 		}
 	}
 }
diff --git a/go.mod b/go.mod
index f5da7cb..0f26e32 100644
--- a/go.mod
+++ b/go.mod
@@ -11,4 +11,4 @@ require (
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
 
-go 1.20
+go 1.24.0