diff --git a/internal/agent/controller/app/server.go b/internal/agent/controller/app/server.go
index e403dba..f7cfde7 100644
--- a/internal/agent/controller/app/server.go
+++ b/internal/agent/controller/app/server.go
@@ -143,7 +143,7 @@ func getCookieDomain(r *http.Request) (string, error) {
 	}
 
 	// If host is an IP address
-	if wildcard.Match(host, "*.*.*.*") {
+	if ip := net.ParseIP(host); ip != nil {
 		return "", nil
 	}