diff --git a/setup.py b/setup.py
index 7c4fa0a..67d61ff 100644
--- a/setup.py
+++ b/setup.py
@@ -20,7 +20,7 @@
     'paramiko>=1.16.0',
     'pathlib2>=2.1.0',
     'blinker>=1.4',
-    'google-measurement-protocol>=0.1.6',
+    'google-measurement-protocol==0.1.6',
 ]
 
 # pylint: disable=invalid-name
diff --git a/termius/core/commands/mixins.py b/termius/core/commands/mixins.py
index cd0fdb7..32efd49 100644
--- a/termius/core/commands/mixins.py
+++ b/termius/core/commands/mixins.py
@@ -280,7 +280,7 @@ def get_visible_identity(self, ssh_config_merger):
         """Return first of visible identity."""
         stack = [
             i.identity for i in ssh_config_merger.get_entry_stack()
-            if i.identity.get('is_visible')
+            if i.identity and i.identity.get('is_visible')
         ]
         return (stack and stack[0]) or None
 
@@ -289,6 +289,6 @@ def get_identity_merger(self, ssh_config_merger):
         """Create identity merger for passed merger."""
         stack = [
             i for i in ssh_config_merger.get_entry_stack()
-            if not i.identity.get('is_visible')
+            if i.identity and not i.identity.get('is_visible')
         ]
         return Merger(stack, 'identity', Identity())
diff --git a/termius/porting/providers/ssh/adapter.py b/termius/porting/providers/ssh/adapter.py
index 55d6fe4..0416d52 100644
--- a/termius/porting/providers/ssh/adapter.py
+++ b/termius/porting/providers/ssh/adapter.py
@@ -15,7 +15,7 @@ class SSHConfigHostAdapter(SshConfigMergerMixin):
 
     def get_instance_ssh_key_label(self, ssh_config):
         """Helper to retrieve ssh_key lable."""
-        if ssh_config['identity'] and ssh_config['identity']['ssh_key']:
+        if ssh_config['identity'] and ssh_config['identity'].get('ssh_key'):
             return ssh_config['identity']['ssh_key']['label']
 
         return None
@@ -43,7 +43,7 @@ def adapt_instance_to_ssh_config_host(self, host_instance):
 
         adapted = {
             'hostname': host_instance['address'],
-            'user': ssh_config['identity']['username'],
+            'user': ssh_config['identity'].get('username'),
             'port': ssh_config['port'] or 22
         }