diff --git a/src/services/slack.ts b/src/services/slack.ts
index cc4d3871d..49fb85803 100644
--- a/src/services/slack.ts
+++ b/src/services/slack.ts
@@ -198,7 +198,7 @@ export class SlackConnector implements ISlackConnector {
           {
             type: 'input',
             block_id: 'block_repo_option',
-            optional: 'true',
+            optional: true,
             label: {
               type: 'plain_text',
               text: 'Select Repo',