diff --git a/packages/proto-signing/package.json b/packages/proto-signing/package.json
index b38eaafe..ad3dc11a 100644
--- a/packages/proto-signing/package.json
+++ b/packages/proto-signing/package.json
@@ -48,6 +48,7 @@
   },
   "devDependencies": {
     "@cosmjs/encoding": "^0.22.1",
+    "@cosmjs/launchpad": "^0.22.1",
     "@cosmjs/utils": "^0.22.1"
   }
 }