diff --git a/packages/bcp/package.json b/packages/bcp/package.json
index 1d8d62ec..46e8f430 100644
--- a/packages/bcp/package.json
+++ b/packages/bcp/package.json
@@ -44,13 +44,13 @@
     "@iov/encoding": "^2.0.2",
     "@iov/stream": "^2.0.2",
     "@iov/utils": "^2.0.2",
-    "@types/bn.js": "^4.11.6",
     "bn.js": "^5.1.1",
     "fast-deep-equal": "^3.1.1",
     "readonly-date": "^1.0.0",
     "xstream": "^11.11.0"
   },
   "devDependencies": {
-    "@iov/keycontrol": "^2.0.2"
+    "@iov/keycontrol": "^2.0.2",
+    "@types/bn.js": "^4.11.6"
   }
 }