diff --git a/README_CN.md b/README_CN.md
index 9c12bf8..08dfa04 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -56,7 +56,7 @@
 
 ```golang
     agollo.GetStringValue(Key, defaultValue)
-    agollo.GetStringValueWithNameSapce(namespace, key, defaultValue)
+    agollo.GetStringValueWithnamespace(namespace, key, defaultValue)
 ```
 
 ### 获取文件内容
diff --git a/client.go b/client.go
index 52f268c..7559dcc 100644
--- a/client.go
+++ b/client.go
@@ -158,9 +158,9 @@ func (c *Client) GetAllKeys(namespace string) []string {
 }
 
 // sync namespace config
-func (c *Client) sync(namesapce string) (*ChangeEvent, error) {
-	releaseKey := c.GetReleaseKey(namesapce)
-	url := configURL(c.conf, namesapce, releaseKey)
+func (c *Client) sync(namespace string) (*ChangeEvent, error) {
+	releaseKey := c.GetReleaseKey(namespace)
+	url := configURL(c.conf, namespace, releaseKey)
 	bts, err := c.requester.request(url)
 	if err != nil || len(bts) == 0 {
 		return nil, err
@@ -216,7 +216,7 @@ func (c *Client) handleResult(result *result) *ChangeEvent {
 	c.setReleaseKey(result.NamespaceName, result.ReleaseKey)
 
 	// dump caches to file
-	c.dump(c.getDumpFileName())
+	_ = c.dump(c.getDumpFileName())
 
 	if len(ret.Changes) == 0 {
 		return nil
diff --git a/conf_test.go b/conf_test.go
index 17d8073..f16b5aa 100644
--- a/conf_test.go
+++ b/conf_test.go
@@ -30,15 +30,15 @@ func TestNewConf(t *testing.T) {
 
 func TestConfNormalize(t *testing.T) {
 	cases := []struct {
-		namesapces []string
+		namespaces []string
 	}{
 		{
-			namesapces: []string{"a", "b"},
+			namespaces: []string{"a", "b"},
 		},
 	}
 
 	for _, c := range cases {
-		conf := &Conf{NameSpaceNames: c.namesapces}
+		conf := &Conf{NameSpaceNames: c.namespaces}
 		conf.normalize()
 		if !strIn(conf.NameSpaceNames, defaultNamespace) {
 			t.Fatal("application should be in conf's namespaces")
diff --git a/notification.go b/notification.go
index 9085ca8..bb6b3af 100644
--- a/notification.go
+++ b/notification.go
@@ -14,13 +14,13 @@ type notificationRepo struct {
 	notifications sync.Map
 }
 
-func (n *notificationRepo) addNotificationID(namesapce string, notificationID int) bool {
-	_, loaded := n.notifications.LoadOrStore(namesapce, notificationID)
+func (n *notificationRepo) addNotificationID(namespace string, notificationID int) bool {
+	_, loaded := n.notifications.LoadOrStore(namespace, notificationID)
 	return !loaded
 }
 
-func (n *notificationRepo) setNotificationID(namesapce string, notificationID int) {
-	n.notifications.Store(namesapce, notificationID)
+func (n *notificationRepo) setNotificationID(namespace string, notificationID int) {
+	n.notifications.Store(namespace, notificationID)
 }
 
 func (n *notificationRepo) getNotificationID(namespace string) (int, bool) {
diff --git a/poller.go b/poller.go
index a5f06f1..51ce374 100644
--- a/poller.go
+++ b/poller.go
@@ -75,9 +75,11 @@ func (p *longPoller) addNamespaces(namespaces ...string) error {
 			update = true
 		}
 	}
+
 	if update {
-		p.pumpUpdates()
+		return p.pumpUpdates()
 	}
+
 	return nil
 }
 
@@ -88,7 +90,7 @@ func (p *longPoller) watchUpdates() {
 	for {
 		select {
 		case <-timer.C:
-			p.pumpUpdates()
+			_ = p.pumpUpdates()
 			timer.Reset(p.pollerInterval)
 
 		case <-p.ctx.Done():
diff --git a/request.go b/request.go
index 48f4b71..f9324e4 100644
--- a/request.go
+++ b/request.go
@@ -37,7 +37,7 @@ func (r *httprequester) request(url string) ([]byte, error) {
 		return ioutil.ReadAll(resp.Body)
 	}
 
-	// Diacard all body if status code is not 200
+	// Discard all body if status code is not 200
 	_, _ = io.Copy(ioutil.Discard, resp.Body)
 	return nil, ErrorStatusNotOK
 }