diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index f2b8cb5..fc9a52b 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -74,6 +74,7 @@ jobs:
             {
               echo 'DIFF_SUMMARY<<EOF'
               cat diff-summary.md
+              echo ''
               echo 'EOF'
             } >> $GITHUB_ENV
           fi
diff --git a/update/index.ts b/update/index.ts
index 3d42312..5e03ce2 100644
--- a/update/index.ts
+++ b/update/index.ts
@@ -89,7 +89,7 @@ async function run() {
     const summary = generateDiffSummary(oldSpec, spec);
     console.log("\nDiff summary:\n" + summary);
     if (process.env.CI) {
-      await Bun.write("diff-summary.md", summary);
+      await Bun.write("diff-summary.md", summary + "\n");
     }
   }