diff --git a/packages/string-templates/src/helpers/date.js b/packages/string-templates/src/helpers/date.js
index 440657b733..27554d1d9e 100644
--- a/packages/string-templates/src/helpers/date.js
+++ b/packages/string-templates/src/helpers/date.js
@@ -1,6 +1,9 @@
 const dayjs = require("dayjs")
 dayjs.extend(require("dayjs/plugin/duration"))
 dayjs.extend(require("dayjs/plugin/advancedFormat"))
+dayjs.extend(require("dayjs/plugin/isoWeek"))
+dayjs.extend(require("dayjs/plugin/weekYear"))
+dayjs.extend(require("dayjs/plugin/weekOfYear"))
 dayjs.extend(require("dayjs/plugin/relativeTime"))
 dayjs.extend(require("dayjs/plugin/utc"))
 dayjs.extend(require("dayjs/plugin/timezone"))