diff --git a/.github/workflows/checklist.yaml b/.github/workflows/checklist.yaml
index eb775ff..cf1626f 100644
--- a/.github/workflows/checklist.yaml
+++ b/.github/workflows/checklist.yaml
@@ -24,7 +24,7 @@ jobs:
             for (const line of lines) {
               if (line.startsWith('## ')) {
                 // Expected format: '## [X.Y.Z] - YYYY-MM-DD'
-                const pattern = !/^\d+\.\d+\.\d+ - \d{4}-\d{2}-\d{2}$/;
+                const pattern = /^\d+\.\d+\.\d+ - \d{4}-\d{2}-\d{2}$/;
                 if (pattern.test(line)) {
                   throw new Error(`Invalid version/date format: ${line}`);
                 }