diff --git a/Godeps/Godeps.json b/Godeps/Godeps.json
index 33cb5ee..3a01db3 100644
--- a/Godeps/Godeps.json
+++ b/Godeps/Godeps.json
@@ -4,8 +4,8 @@
 	"Deps": [
 		{
 			"ImportPath": "github.com/STNS/STNS/attribute",
-			"Comment": "v0.0.1-45-g8d23181",
-			"Rev": "8d23181a70ad508ab126192177f85ecb622a7173"
+			"Comment": "v0.0.1-56-gddf0757",
+			"Rev": "ddf07572ee059179511babea80c1c7598242694a"
 		},
 		{
 			"ImportPath": "github.com/pyama86/toml",
diff --git a/package/RPM/SPECS/libnss_stns.spec b/package/RPM/SPECS/libnss_stns.spec
index bd73750..db1e8d0 100644
--- a/package/RPM/SPECS/libnss_stns.spec
+++ b/package/RPM/SPECS/libnss_stns.spec
@@ -5,7 +5,7 @@ Name: libnss-stns
 Group: SipmleTomlNameService
 URL: https://github.com/pyama86/libnss_stns
 Version: 0.0
-Release: 1
+Release: 2
 License: MIT
 Source0:   libnss_stns.conf
 Packager:  libnss-stns
@@ -38,7 +38,7 @@ rm -rf %{buildroot}
 %config(noreplace) %{_sysconfdir}/stns/libnss_stns.conf
 
 %post
-ln -s /usr/%{_lib}/libnss_stns.so /usr/%{_lib}/libnss_stns.so.2
+ln -fs /usr/%{_lib}/libnss_stns.so /usr/%{_lib}/libnss_stns.so.2
 
 %postun
 rm -f /usr/%{_lib}/libnss_stns.so.2
diff --git a/package/deb/debian/changelog b/package/deb/debian/changelog
index c1e1b6d..0e6f05a 100644
--- a/package/deb/debian/changelog
+++ b/package/deb/debian/changelog
@@ -1,3 +1,9 @@
+libnss-stns (0.0.2) STABLE; urgency=low
+
+  * fix https://github.com/STNS/libnss_stns/pull/3
+
+ -- pyama86 <www.kazu.com@gmail.com>  Sat, 09 Jan 2016 10:43:05 +0000
+
 libnss-stns (0.0.1) UNSTABLE; urgency=low
 
   * Initial release. 
diff --git a/package/deb/debian/postinst b/package/deb/debian/postinst
index 4e20fa8..4198d43 100644
--- a/package/deb/debian/postinst
+++ b/package/deb/debian/postinst
@@ -6,7 +6,7 @@ DEB_HOST_MULTIARCH=`dpkg-architecture -qDEB_HOST_MULTIARCH`
 case "$1" in
 
   configure)
-    ln -s /usr/lib/$DEB_HOST_MULTIARCH/libnss_stns.so /lib/$DEB_HOST_MULTIARCH/libnss_stns.so.2
+    ln -sf /usr/lib/$DEB_HOST_MULTIARCH/libnss_stns.so /lib/$DEB_HOST_MULTIARCH/libnss_stns.so.2
   ;;
 
   abort-upgrade|abort-remove|abort-deconfigure|failed-upgrade)
diff --git a/request/request.go b/request/request.go
index fc9ddd7..1fa7dfb 100644
--- a/request/request.go
+++ b/request/request.go
@@ -23,6 +23,8 @@ var ConfigFileName = "/etc/stns/libnss_stns.conf"
 var Loaded *config.Config
 var Cache map[string]*CacheObject
 
+var Pid int
+
 type CacheObject struct {
 	userGroup *attribute.UserGroups
 	err       error
@@ -45,6 +47,12 @@ func NewRequest(resource string, column string, value string) (*Request, error)
 	}
 
 	r.ApiPath = strings.Join(urls, "/")
+
+	if Pid != 0 && Pid != os.Getpid() {
+		return nil, errors.New("unsupported fork process")
+	}
+
+	Pid = os.Getpid()
 	return &r, nil
 }
 
@@ -67,25 +75,23 @@ func (r *Request) Get() (attribute.UserGroups, error) {
 	// default negative cache
 	Cache[r.ApiPath] = &CacheObject{nil, errors.New(r.ApiPath + " is not fond")}
 
-	client := &http.Client{}
-
-	transport := &http.Transport{
-		TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
-	}
-
-	if r.Config.SslVerify == false {
-		client.Transport = transport
-	}
+	http.DefaultTransport.(*http.Transport).TLSClientConfig = &tls.Config{InsecureSkipVerify: !r.Config.SslVerify}
 
 	for _, v := range perm {
 		endPoint := r.Config.ApiEndPoint[v]
 		url := endPoint + "/" + r.ApiPath
 		req, err := http.NewRequest("GET", url, nil)
+
+		if err != nil {
+			lastError = err
+			continue
+		}
+
 		if r.Config.User != "" && r.Config.Password != "" {
 			req.SetBasicAuth(r.Config.User, r.Config.Password)
 		}
 
-		res, err := client.Do(req)
+		res, err := http.DefaultClient.Do(req)
 
 		if err != nil {
 			lastError = err
diff --git a/resource.go b/resource.go
index 99df67f..9cefb36 100644
--- a/resource.go
+++ b/resource.go
@@ -68,6 +68,7 @@ func setList(resource_type string, list attribute.UserGroups, position *int) {
 	resource, err := get(resource_type, "list", "")
 	if err != nil {
 		*position = NSS_STATUS_TRYAGAIN
+		return
 	}
 
 	if len(resource) > 0 {
@@ -75,7 +76,6 @@ func setList(resource_type string, list attribute.UserGroups, position *int) {
 			list[k] = v
 		}
 	}
-	return
 }
 
 func resetList(list attribute.UserGroups, position *int) {