diff --git a/git.version.ts b/git.version.ts
index 1ea61ae9210a51e8012ce3dac1d8154f85ce666c..2aff5822406cada1688e0a0436d8515b3777f80f 100644
--- a/git.version.ts
+++ b/git.version.ts
@@ -12,7 +12,7 @@ async function createVersionsFile(filename: string) {
 
   const content = dedent`
       // this file is automatically generated by git.version.ts script
-      export const versions = {
+      export const versions: Versions = {
         version: "${process.env.npm_package_version}",
         revision: "${revision}",
         branch: "${branch}"