diff --git a/packages/same-structure/package.json b/packages/same-structure/package.json
index 3614734aa6c..1ad7b2716dc 100644
--- a/packages/same-structure/package.json
+++ b/packages/same-structure/package.json
@@ -30,7 +30,7 @@
   "homepage": "https://github.com/Agoric/agoric-sdk#readme",
   "dependencies": {
     "@agoric/assert": "^0.0.12-dev.0",
-    "@agoric/marshal": "^0.2.7-dev.0"
+    "@agoric/marshal": "^0.5.0"
   },
   "devDependencies": {
     "ava": "^3.12.1",