diff --git a/package.json b/package.json
index 8dc3911..14f0c55 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,5 @@
 {"name": "v4l2camera",
- "version": "0.4.0",
+ "version": "0.4.1",
  "description": "Capturing images from USB(UVC) webcam on linux machines",
  "keywords": ["linux", "camera", "native", "v4l2", "video4linux2"],
  "homepage": "https://github.com/bellbind/node-v4l2camera", 
diff --git a/readme.md b/readme.md
index 8e20ac7..656bdd5 100644
--- a/readme.md
+++ b/readme.md
@@ -50,9 +50,9 @@ Initializing API
       : Capturing interval per `numerator/denominator` seconds 
       (e.g. 30fps is 1/30)
 - `cam.configSet(format)`
-  : Set capture `width`, `height` and interval per `numerator/denominator` sec
-- `cam.configGet()' : Get a format object of current config
-
+  : Set capture `width`, `height`, `interval` per `numerator/denominator` sec
+  if the members exist in the `format` object
+- `cam.configGet()` : Get a `format` object of current config
 
 Capturing API