diff --git a/index.js b/index.js
index b2f38a0..5df849a 100644
--- a/index.js
+++ b/index.js
@@ -70,7 +70,7 @@ async function main() {
     const start_version = core.getInput("start-version");
     const current_version = await increaseVersion(url_pattern, start_version);
     core.info(`The new version determend is ${current_version}`);
-    core.setOutput("current_version", current_version);
+    core.setOutput("current_version", `${current_version}`);
     // return current_version;
   } catch (error) {
     core.setFailed(`Action failed with error: ${error}`);