diff --git a/javascript/grid-ui/BUILD.bazel b/javascript/grid-ui/BUILD.bazel
index 19a1095d13d1e..d684d47c7535e 100644
--- a/javascript/grid-ui/BUILD.bazel
+++ b/javascript/grid-ui/BUILD.bazel
@@ -79,6 +79,7 @@ esbuild(
         "os",
         "path",
         "util",
+        "@novnc/novnc/core/rfb",
     ],
     format = "iife",
     minify = True,