diff --git a/package.json b/package.json
index e97d612..4cd166c 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "babel-preset-es2015": "^6.5.0",
     "nyc": "^8.1.0",
     "package-json-to-readme": "^1.5.0",
-    "seamless-immutable": "^6.0.0",
+    "seamless-immutable": "^7.1.0",
     "semistandard": "^9.0.0",
     "snazzy": "^5.0.0"
   },