diff --git a/command/clearEstimate.go b/command/clearEstimate.go
index 063695c..9e188ef 100644
--- a/command/clearEstimate.go
+++ b/command/clearEstimate.go
@@ -10,6 +10,7 @@ func CmdClearEstimate(c *cli.Context) {
 	issueNumer, err := strconv.Atoi(c.Args().Get(0))
 	if err != nil {
 		cli.ShowCommandHelp(c, "clearEstimate")
+		os.Exit(1)
 	}
 	client := NewZenhubClient(c)
 
diff --git a/command/estimate.go b/command/estimate.go
index 84c73c2..d60232f 100644
--- a/command/estimate.go
+++ b/command/estimate.go
@@ -10,10 +10,12 @@ func CmdEstimate(c *cli.Context) {
 	issueNumer, err := strconv.Atoi(c.Args().Get(0))
 	if err != nil {
 		cli.ShowCommandHelp(c, "estimate")
+		os.Exit(1)
 	}
 	estimateValue, err := strconv.Atoi(c.Args().Get(1))
 	if err != nil {
 		cli.ShowCommandHelp(c, "estimate")
+		os.Exit(1)
 	}
 	client := NewZenhubClient(c)
 
diff --git a/command/issue.go b/command/issue.go
index 05f257f..cb513e7 100644
--- a/command/issue.go
+++ b/command/issue.go
@@ -3,6 +3,7 @@ package command
 import (
 	"encoding/json"
 	"fmt"
+	"os"
 	"github.com/codegangsta/cli"
 	zenhub "github.com/cou929/zenhub-client"
 	"strconv"
@@ -30,6 +31,7 @@ func CmdIssue(c *cli.Context) {
 	issueNumber, err := strconv.Atoi(c.Args().Get(0))
 	if err != nil {
 		cli.ShowCommandHelp(c, "issue")
+		os.Exit(1)
 	}
 
 	client := NewZenhubClient(c)
@@ -56,12 +58,21 @@ func CmdIssue(c *cli.Context) {
 
 	result := map[string]interface{}{
 		"issueNumber":   issueNumber,
-		"pipelineId":    pipeline.Id,
-		"pipelineName":  pipeline.Name,
-		"estimateValue": estimate.Value,
+		"pipelineId":    nil,
+		"pipelineName":  nil,
+		"estimateValue": nil,
 		"pluses":        pluses,
 	}
 
+	if pipeline != nil {
+		result["pipelineId"] = pipeline.Id
+		result["pipelineName"] = pipeline.Name
+	}
+
+	if estimate != nil {
+		result["estimateValue"] = estimate.Value
+	}
+
 	marshaled, err := json.Marshal(result)
 	DieIfError(err)
 
diff --git a/command/transfer.go b/command/transfer.go
index d9f6ae7..f37d214 100644
--- a/command/transfer.go
+++ b/command/transfer.go
@@ -10,10 +10,12 @@ func CmdTransfer(c *cli.Context) {
 	issueNumer, err := strconv.Atoi(c.Args().Get(0))
 	if err != nil {
 		cli.ShowCommandHelp(c, "transfer")
+		os.Exit(1)
 	}
 	pipelineName := c.Args().Get(1)
 	if pipelineName == "" {
 		cli.ShowCommandHelp(c, "transfer")
+		os.Exit(1)
 	}
 	client := NewZenhubClient(c)
 
diff --git a/version.go b/version.go
index 4ca932c..c716b7c 100644
--- a/version.go
+++ b/version.go
@@ -1,4 +1,4 @@
 package main
 
 const Name string = "zhb"
-const Version string = "0.1.2"
+const Version string = "0.1.3"
diff --git a/wercker.yml b/wercker.yml
index 5beabd3..f3ec4f6 100644
--- a/wercker.yml
+++ b/wercker.yml
@@ -29,5 +29,5 @@ deploy:
     - tcnksm/ghr:
         token: $GITHUB_TOKEN
         input: dist
-        version: v0.1.2
+        version: v0.1.3
         replace: true