diff --git a/lib/extract/extractStroke.js b/lib/extract/extractStroke.js
index 05da84fe..5c774e15 100644
--- a/lib/extract/extractStroke.js
+++ b/lib/extract/extractStroke.js
@@ -49,7 +49,7 @@ export default function(props, styleProperties) {
         strokeLinecap: caps[props.strokeLinecap] || 0,
         strokeLinejoin: joins[props.strokeLinejoin] || 0,
         strokeDasharray: strokeDasharray,
-        strokeWidth: strokeWidth || '1',
+        strokeWidth: `${strokeWidth || 1}`,
         strokeDashoffset: strokeDasharray ? (+props.strokeDashoffset || 0) : null,
         strokeMiterlimit: props.strokeMiterlimit || 4
     };