diff --git a/lib/extract/extractStroke.js b/lib/extract/extractStroke.js
index 53bc4069..56b6426f 100644
--- a/lib/extract/extractStroke.js
+++ b/lib/extract/extractStroke.js
@@ -39,7 +39,7 @@ export default function(props, styleProperties) {
         // to yield an even number of values. Thus, 5,3,2 is equivalent to 5,3,2,5,3,2.
         strokeDasharray = extractLengthList(strokeDasharray);
         if (strokeDasharray && (strokeDasharray.length % 2) === 1) {
-            strokeDasharray.concat(strokeDasharray);
+            strokeDasharray = strokeDasharray.concat(strokeDasharray);
         }
     }
 
diff --git a/package.json b/package.json
index dc4f5286..c50cfcb7 100644
--- a/package.json
+++ b/package.json
@@ -33,10 +33,7 @@
     "devDependencies": {
         "babel-eslint": "^6.1.2",
         "eslint": "^2.13.1",
-        "eslint-plugin-react": "^4.3.0",
-        "prop-types": "^15.5.10",
-        "react": "16.0.0-alpha.12",
-        "react-native": ">=0.46.0"
+        "eslint-plugin-react": "^4.3.0"
     },
     "nativePackage": true
 }