diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 65aa853..93d7fc1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -330,7 +330,7 @@ jobs:
             yq -i '.metadata.name = "migrate-schema-" + env(SHORT_SHA)' "$MIGRATE_JOB"
             yq -i '.metadata.annotations."groombook.app/deploy-version" = env(TAG)' "$MIGRATE_JOB"
             # Ensure ttlSecondsAfterFinished is set for automatic cleanup
-            yq -i '.spec.ttlSecondsAfterFinished //= 86400' "$MIGRATE_JOB"
+            yq -i '.spec.ttlSecondsAfterFinished = (.spec.ttlSecondsAfterFinished // 86400)' "$MIGRATE_JOB"
           fi
 
           # Update seed Job name to include short SHA (immutable template fix)
@@ -339,7 +339,7 @@ jobs:
             yq -i '.metadata.name = "seed-test-data-" + env(SHORT_SHA)' "$SEED_JOB"
             yq -i '.metadata.annotations."groombook.app/deploy-version" = env(TAG)' "$SEED_JOB"
             # Ensure ttlSecondsAfterFinished is set for automatic cleanup
-            yq -i '.spec.ttlSecondsAfterFinished //= 86400' "$SEED_JOB"
+            yq -i '.spec.ttlSecondsAfterFinished = (.spec.ttlSecondsAfterFinished // 86400)' "$SEED_JOB"
           fi
 
           git -C /tmp/infra diff --stat