diff --git a/polygerrit-ui/app/elements/core/gr-main-header/gr-main-header.js b/polygerrit-ui/app/elements/core/gr-main-header/gr-main-header.ts
similarity index 100%
rename from polygerrit-ui/app/elements/core/gr-main-header/gr-main-header.js
rename to polygerrit-ui/app/elements/core/gr-main-header/gr-main-header.ts