diff --git a/main.js b/main.js
index 4f5f42c..70a9d7a 100644
--- a/main.js
+++ b/main.js
@@ -73,7 +73,7 @@ async function createOrGetRelease(client, owner, repo, body) {
     let release = await client.repository.repoGetReleaseByTag({
       owner: owner,
       repo: repo,
-      tag: body.tag_name,
+      tag: encodeURIComponent(body.tag_name),
     })
     const release_id = release.id;
     let target_commitish = release.target_commitish;