diff --git a/build/build-viewer.js b/build/build-viewer.js
index 507dc2fad56a..e2ab54d0d876 100644
--- a/build/build-viewer.js
+++ b/build/build-viewer.js
@@ -126,7 +126,7 @@ async function compileJs() {
             }
 
             next();
-          }
+          },
         });
       },
     });