diff --git a/pkg/certmanager/certificate.go b/pkg/certmanager/certificate.go
index c6fbeeb..e8126d2 100644
--- a/pkg/certmanager/certificate.go
+++ b/pkg/certmanager/certificate.go
@@ -125,7 +125,7 @@ func (c *certificateClient) PatchSecretName(ctx context.Context, namespace, name
 
 func extractHosts(routes []map[string]interface{}) []string {
 	var hosts []string
-	re := regexp.MustCompile(`Host\(([^)]*)\)`)
+	re := regexp.MustCompile(`Host\(([^)` + "`" + `]*)\)`)
 
 	for _, route := range routes {
 		var (