diff --git a/CONFIGURATION.md b/CONFIGURATION.md
index 7b01b2e..4200b90 100644
--- a/CONFIGURATION.md
+++ b/CONFIGURATION.md
@@ -48,7 +48,7 @@ The configuration for Gaurun has some sections. The example is [here](conf/gauru
 |keepalive_timeout|int   |time for continuing keep-alive connection to GCM|90     |    |
 |keepalive_conns  |int   |number of keep-alive connection to GCM          |runtime.NumCPU()||
 |retry_max        |int   |maximum retry count for push notication to GCM  |1      |    |
-|use_fcm          |bool  |Use FCM endpoint instead of GCM (by default, `gaurun` uses GCM endpoint)  |false      |    |
+|use_fcm          |bool  |Use FCM endpoint instead of GCM (by default, `gaurun` uses FCM endpoint)  |true      |    |
 
 ## Log Section
 
diff --git a/gaurun/client.go b/gaurun/client.go
index 811ecab..3ec9549 100644
--- a/gaurun/client.go
+++ b/gaurun/client.go
@@ -26,11 +26,11 @@ func keepAliveInterval(keepAliveTimeout int) int {
 
 // InitGCMClient initializes GCMClient which is globally declared.
 func InitGCMClient() error {
-	// By default, use GCM endpoint. If UseFCM is explicitly enabled via configuration,
-	// use FCM endpoint.
-	url := gcm.GCMSendEndpoint
-	if ConfGaurun.Android.UseFCM {
-		url = gcm.FCMSendEndpoint
+	// By default, use FCM endpoint. If UseFCM is explicitly disabled via configuration,
+	// use GCM endpoint.
+	url := gcm.FCMSendEndpoint
+	if !ConfGaurun.Android.UseFCM {
+		url = gcm.GCMSendEndpoint
 	}
 
 	var err error
diff --git a/gaurun/conf.go b/gaurun/conf.go
index d6706d0..8e09815 100644
--- a/gaurun/conf.go
+++ b/gaurun/conf.go
@@ -75,7 +75,7 @@ func BuildDefaultConf() ConfToml {
 	conf.Android.KeepAliveTimeout = 90
 	conf.Android.KeepAliveConns = numCPU
 	conf.Android.RetryMax = 1
-	conf.Android.UseFCM = false
+	conf.Android.UseFCM = true
 	// iOS
 	conf.Ios.Enabled = true
 	conf.Ios.PemCertPath = ""
diff --git a/gaurun/conf_test.go b/gaurun/conf_test.go
index 6c896d7..a3f71a2 100644
--- a/gaurun/conf_test.go
+++ b/gaurun/conf_test.go
@@ -44,7 +44,7 @@ func (suite *ConfigTestSuite) TestValidateConfDefault() {
 	assert.Equal(suite.T(), suite.ConfGaurunDefault.Android.KeepAliveTimeout, 90)
 	assert.Equal(suite.T(), int64(suite.ConfGaurunDefault.Android.KeepAliveConns), suite.ConfGaurunDefault.Core.WorkerNum)
 	assert.Equal(suite.T(), suite.ConfGaurunDefault.Android.RetryMax, 1)
-	assert.Equal(suite.T(), suite.ConfGaurunDefault.Android.UseFCM, false)
+	assert.Equal(suite.T(), suite.ConfGaurunDefault.Android.UseFCM, true)
 	// Ios
 	assert.Equal(suite.T(), suite.ConfGaurunDefault.Ios.Enabled, true)
 	assert.Equal(suite.T(), suite.ConfGaurunDefault.Ios.PemCertPath, "")