diff --git a/pda/listdb/ListDB.py b/pda/listdb/ListDB.py
index d5c895c..026eede 100755
--- a/pda/listdb/ListDB.py
+++ b/pda/listdb/ListDB.py
@@ -198,6 +198,7 @@ def _get_one_label(self, name, color, labels):
         """
 
         resp = requests.get(self.url_labels+'/'+name, auth=self.auth)
+        resp.connection.close()
 
         if resp.status_code == requests.codes.ok: # label found
             labels.append(name)
@@ -205,12 +206,14 @@ def _get_one_label(self, name, color, labels):
             rep = requests.put(self.url_labels, 
                                data=json.dumps({'name': name, 'color': color}), 
                                auth=self.auth)
+            rep.connection.close()
 
             if rep.status_code == requests.codes.created:
                 labels.append(name)
             else:
                 die_msg(PROG_NAME, 'label created failed: ' + name)
 
+
     def _update_labels(self, cmd):
         """update **Github Issues** based on the information given by `cmd`
         :param cmd: dict
@@ -222,6 +225,7 @@ def _update_labels(self, cmd):
 
         resp = requests.get(self.url_issues+'/'+str(issue_number)+'/labels', 
                             auth=self.auth)
+        resp.connection.close()
 
         if resp.status_code == requests.codes.ok:
             # replacing labels
@@ -248,6 +252,7 @@ def _update_labels(self, cmd):
             die_msg(PROG_NAME, \
                     'failed to retrive labels for current issue: '+str(issue_number))
 
+
         return labels
 
     def _get_labels(self, cmd):
@@ -279,6 +284,7 @@ def _get_milestone_number(self, cmd):
         # look for existing milestone
         if milestone_title:
             resp = requests.get(self.url_milestones, auth=self.auth)
+            resp.connection.close()
 
             if resp.status_code == requests.codes.ok:
                 for milestone in resp.json():
@@ -293,6 +299,7 @@ def _get_milestone_number(self, cmd):
             resp = requests.post(url=self.url_milestones,
                               data=json.dumps({'title': milestone_title}),
                               auth=self.auth)
+            resp.connection.close()
 
             if resp.status_code == requests.codes.created:
                 milestone_number = resp.json()['number']
@@ -354,16 +361,19 @@ def _exec_cmd_on_remote(self, cmd):
                                  data=json.dumps(payload), 
                                  auth=self.auth)
             success = (resp.status_code == requests.codes.created)
+            resp.connection.close()
         elif cmd['CMD'] == 'EDIT':
             resp = requests.patch(url=url, 
                                   data=json.dumps(payload), 
                                   auth=self.auth)
             success = (resp.status_code == requests.codes.ok)
+            resp.connection.close()
         else: # REMOVE
             resp = requests.patch(url=url, 
                                   data=json.dumps(payload), 
                                   auth=self.auth)
             success = (resp.status_code == requests.codes.ok)
+            resp.connection.close()
 
         return success
 
@@ -433,6 +443,7 @@ def sync_local_dbstore(self):
         resp = requests.get(self.url_issues, 
                             params={'state': 'open'}, 
                             auth=self.auth)
+        resp.connection.close()
 
         if resp.status_code == requests.codes.ok:
             # write issue data into local db store