diff --git a/index.d.ts b/index.d.ts
index a43036e1..e79b20de 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -61,6 +61,7 @@ declare module 'moment' {
         guess(ignoreCache?: boolean): string;
 
         setDefault(timezone?: string): Moment;
+        dataVersion: string;
     }
 
     interface Moment {
diff --git a/typing-tests/moment-tests.ts b/typing-tests/moment-tests.ts
index 74c518d5..d68a90ed 100644
--- a/typing-tests/moment-tests.ts
+++ b/typing-tests/moment-tests.ts
@@ -7,6 +7,7 @@ import moment = require('../');
 // copy(include.filter(v => !exclude.some(v2 => v2 === v)).map(v => v.innerText).join('\n\n'));
 
 moment().tz("America/Los_Angeles").format();
+moment.tz.dataVersion; // 2022c
 
 var a = moment.tz("2013-11-18 11:55", "America/Toronto");
 var b = moment.tz("May 12th 2014 8PM", "MMM Do YYYY hA", "America/Toronto");
@@ -256,4 +257,4 @@ subset.untils.length; // 11
 var all    = { name : "America/Los_Angeles", abbrs : ['EST', 'EDT'], offsets : [1, 2], untils : [1, 2]};
 var subset = moment.tz.filterYears(all, 2012);
 all.untils.length;    // 186
-subset.untils.length; // 3
\ No newline at end of file
+subset.untils.length; // 3