diff --git a/package.json b/package.json
index d385d76..7d121c1 100644
--- a/package.json
+++ b/package.json
@@ -15,6 +15,7 @@
     "ammo.js": "kripken/ammo.js#aab297a4164779c3a9d8dc8d9da26958de3cb778",
     "case": "^1.6.3",
     "dexie": "^3.0.3",
+    "err-code": "^2.0.3",
     "fake-indexeddb": "^3.1.2",
     "fuse.js": "^6.4.1",
     "interactjs": "^1.9.7",
diff --git a/yarn.lock b/yarn.lock
index 168f495..3c6ecc0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4920,6 +4920,11 @@ entities@^2.0.0:
   resolved "https://registry.yarnpkg.com/entities/-/entities-2.1.0.tgz#992d3129cf7df6870b96c57858c249a120f8b8b5"
   integrity sha512-hCx1oky9PFrJ611mf0ifBLBRW8lUUVRlFolb5gWRfIELabBlbp9xZvrqZLZAs+NxFnbfQoeGd8wDkygjg7U85w==
 
+err-code@^2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/err-code/-/err-code-2.0.3.tgz#23c2f3b756ffdfc608d30e27c9a941024807e7f9"
+  integrity sha512-2bmlRpNKBxT/CRmPOlyISQpNj+qSeYvcym/uT0Jx2bMOlKLtSy1ZmLuVxSEKKyor/N5yhvp/ZiG1oE3DEYMSFA==
+
 errno@^0.1.3, errno@~0.1.7:
   version "0.1.7"
   resolved "https://registry.yarnpkg.com/errno/-/errno-0.1.7.tgz#4684d71779ad39af177e3f007996f7c67c852618"