diff --git a/.travis.yml b/.travis.yml
index 65bf9f3..8abb1ed 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,6 +16,10 @@ go:
 
 go_import_path: aahframework.org/config.v0
 
+install:
+  - git config --global http.https://aahframework.org.followRedirects true
+  - go get -t -v ./...
+
 script:
   - bash <(curl -s https://aahframework.org/go-test)
 
diff --git a/README.md b/README.md
index 6edf55b..0b62f4c 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,9 @@
 # config - aah framework
 
 [![Build Status](https://travis-ci.org/go-aah/config.svg?branch=master)](https://travis-ci.org/go-aah/config)  [![codecov](https://codecov.io/gh/go-aah/config/branch/master/graph/badge.svg)](https://codecov.io/gh/go-aah/config/branch/master)  [![Go Report Card](https://goreportcard.com/badge/aahframework.org/config.v0)](https://goreportcard.com/report/aahframework.org/config.v0)
-[![Version](https://img.shields.io/badge/version-0.4.1-blue.svg)](https://github.com/go-aah/config/releases/latest) [![GoDoc](https://godoc.org/aahframework.org/config.v0?status.svg)](https://godoc.org/aahframework.org/config.v0)  [![License](https://img.shields.io/github/license/go-aah/config.svg)](LICENSE)
+[![Version](https://img.shields.io/badge/version-0.4.2-blue.svg)](https://github.com/go-aah/config/releases/latest) [![GoDoc](https://godoc.org/aahframework.org/config.v0?status.svg)](https://godoc.org/aahframework.org/config.v0)  [![License](https://img.shields.io/github/license/go-aah/config.svg)](LICENSE) [![Twitter](https://img.shields.io/badge/twitter-@aahframework-55acee.svg)](https://twitter.com/aahframework)
 
-***v0.4.1 [released](https://github.com/go-aah/config/releases/latest) and tagged on Apr 23, 2017***
+***v0.4.2 [released](https://github.com/go-aah/config/releases/latest) and tagged on Jul 30, 2017***
 
 `config` library is powerful and flexible for configuration purpose. It's thin layer around `forge` config syntax which is very similar to Typesafe HOCON syntax :satisfied:. aah framework and it's modules is powered with `aah/config` library.
 
diff --git a/config.go b/config.go
index 7bc32f0..95d5454 100644
--- a/config.go
+++ b/config.go
@@ -19,7 +19,7 @@ import (
 )
 
 // Version no. of aahframework.org/config library
-var Version = "0.4.1"
+var Version = "0.4.2"
 
 var errKeyNotFound = errors.New("config: not found")
 
@@ -365,8 +365,8 @@ func (c *Config) Merge(source *Config) error {
 
 // IsExists returns true if given is exists in the config otherwise returns false
 func (c *Config) IsExists(key string) bool {
-	_, f := c.get(c.prepareKey(key))
-	return f
+	_, found := c.Get(key)
+	return found
 }
 
 // ToJSON method returns the configuration values as JSON string.
diff --git a/config_test.go b/config_test.go
index 1ebfc24..fb7e5c6 100644
--- a/config_test.go
+++ b/config_test.go
@@ -348,7 +348,6 @@ func TestLoadFiles(t *testing.T) {
 	assert.Equal(t, float32(1000.5), cfg.Float32Default("subsection.sub_float", 0.0))
 	assert.Equal(t, float32(222.2), cfg.Float32Default("float32", 0.0))
 	assert.Equal(t, true, cfg.BoolDefault("falsevalue", false))
-	// assert.Equal(t, false, cfg.BoolDefault("truevalue", true)) // TODO check why result is different
 
 	// fail cases
 	_, err = LoadFiles(join(testdataPath, "not_exists.cfg"))