diff --git a/loop/webui/esbuild.go b/loop/webui/esbuild.go
index 03c745e..b86b7d7 100644
--- a/loop/webui/esbuild.go
+++ b/loop/webui/esbuild.go
@@ -334,7 +334,7 @@
 	defer os.RemoveAll(tmpDir)
 
 	// Create output directory if it doesn't exist
-	if err := os.MkdirAll(outputDir, 0755); err != nil {
+	if err := os.MkdirAll(outputDir, 0o755); err != nil {
 		return "", err
 	}