diff --git a/package.json b/package.json
index 35d46169..df5f6654 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     "coffee-script": "^1.12.6",
     "compression-webpack-plugin": "^0.4.0",
     "css-loader": "^0.28.2",
-    "deepcopy": "^0.6.3",
+    "deepcopy": "^1.0.0",
     "extract-text-webpack-plugin": "^2.1.0",
     "file-loader": "^0.11.1",
     "glob": "^7.1.2",
diff --git a/yarn.lock b/yarn.lock
index fbb8f4b2..f9874a5d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1463,9 +1463,11 @@ deep-extend@~0.4.0:
   version "0.4.2"
   resolved "https://registry.yarnpkg.com/deep-extend/-/deep-extend-0.4.2.tgz#48b699c27e334bf89f10892be432f6e4c7d34a7f"
 
-deepcopy@^0.6.3:
-  version "0.6.3"
-  resolved "https://registry.yarnpkg.com/deepcopy/-/deepcopy-0.6.3.tgz#634780f2f8656ab771af8fa8431ed1ccee55c7b0"
+deepcopy@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/deepcopy/-/deepcopy-1.0.0.tgz#cea0f3443b3617d2421e066be370cc8126f8959c"
+  dependencies:
+    type-detect "^4.0.8"
 
 defaults@^1.0.2:
   version "1.0.3"
@@ -4500,6 +4502,10 @@ tweetnacl@^0.14.3, tweetnacl@~0.14.0:
   version "0.14.5"
   resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-0.14.5.tgz#5ae68177f192d4456269d108afa93ff8743f4f64"
 
+type-detect@^4.0.8:
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.8.tgz#7646fb5f18871cfbb7749e69bd39a6388eb7450c"
+
 type-is@~1.6.15:
   version "1.6.15"
   resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.15.tgz#cab10fb4909e441c82842eafe1ad646c81804410"