diff --git a/package.json b/package.json
index aa144e4..6ecc4fc 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "classnames": "^2.2.5",
     "flag-icon-css": "^2.8.0",
     "react-css-modules": "^4.1.0",
-    "tcomb": "^3.2.17",
+    "tcomb": "^3.2.20",
     "tcomb-react": "^0.9.3"
   },
   "devDependencies": {