diff --git a/scenarios/cybok_heist/scenario.json.erb b/scenarios/cybok_heist/scenario.json.erb
index c30c2c6..81a8f70 100644
--- a/scenarios/cybok_heist/scenario.json.erb
+++ b/scenarios/cybok_heist/scenario.json.erb
@@ -65,6 +65,7 @@
                 {
                     "type": "briefcase",
                     "name": "Professor's briefcase",
+                    "locked": true,
                     "takeable": false,
                     "observations": "A worn briefcase sitting in the corner, partially open",
                     "contents": [