README.md in sewing_kit-0.96.0 vs README.md in sewing_kit-0.97.0

@@ -64,10 +64,10 @@
   # occupying more than Node's default 1.4GB heap allocation)
   config.development_options[:heap] = 4000
 
   # Disable source maps (very large apps may need to builds sans source maps to
   # reduce development mode's memory usage)
-  config.development_options[:source_maps] = false
+  config.development_options[:source_maps] = 'off'
 end
 ```
 
 ## Testing the front end