diff --git a/document_sftp/document_sftp_handle.py b/document_sftp/document_sftp_handle.py
index a5e0b53c..f4f39189 100644
--- a/document_sftp/document_sftp_handle.py
+++ b/document_sftp/document_sftp_handle.py
@@ -1,7 +1,10 @@
 # -*- coding: utf-8 -*-
 # © 2016 Therp BV <http://therp.nl>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
-from paramiko import SFTP_EOF, SFTPHandle
+try:
+    from paramiko import SFTP_EOF, SFTPHandle
+except ImportError:
+    pass
 from base64 import b64decode
 
 
@@ -14,6 +17,7 @@ class DocumentSFTPHandle(SFTPHandle):
         return self.attachment.env['document.sftp.root']._file(self.attachment)
 
     def read(self, offset, length):
+        # pylint: disable=W8106
         data = b64decode(self.attachment.datas)
         if offset > len(data):
             return SFTP_EOF
diff --git a/document_sftp/document_sftp_server.py b/document_sftp/document_sftp_server.py
index 383ac6e8..588d54f0 100644
--- a/document_sftp/document_sftp_server.py
+++ b/document_sftp/document_sftp_server.py
@@ -1,10 +1,13 @@
 # -*- coding: utf-8 -*-
 # © 2016 Therp BV <http://therp.nl>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
-from paramiko import AUTH_SUCCESSFUL, AUTH_FAILED,\
-    OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED, OPEN_SUCCEEDED,\
-    RSAKey, ServerInterface
-from paramiko.py3compat import decodebytes
+try:
+    from paramiko import AUTH_SUCCESSFUL, AUTH_FAILED,\
+        OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED, OPEN_SUCCEEDED,\
+        RSAKey, ServerInterface
+    from paramiko.py3compat import decodebytes
+except ImportError:
+    pass
 from openerp.exceptions import AccessDenied
 
 
diff --git a/document_sftp/document_sftp_sftp_server.py b/document_sftp/document_sftp_sftp_server.py
index ed4e7597..a610cb54 100644
--- a/document_sftp/document_sftp_sftp_server.py
+++ b/document_sftp/document_sftp_sftp_server.py
@@ -1,7 +1,11 @@
 # -*- coding: utf-8 -*-
 # © 2016 Therp BV <http://therp.nl>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
-from paramiko import SFTP_PERMISSION_DENIED, SFTPServerInterface, SFTPServer
+try:
+    from paramiko import SFTP_PERMISSION_DENIED, SFTPServerInterface,\
+        SFTPServer
+except ImportError:
+    pass
 from openerp import api
 
 
diff --git a/document_sftp/document_sftp_transport.py b/document_sftp/document_sftp_transport.py
index 8e5f0b8f..898b3c03 100644
--- a/document_sftp/document_sftp_transport.py
+++ b/document_sftp/document_sftp_transport.py
@@ -1,8 +1,11 @@
 # -*- coding: utf-8 -*-
 # © 2016 Therp BV <http://therp.nl>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
-from paramiko import Transport
-from paramiko.transport import DEFAULT_WINDOW_SIZE, DEFAULT_MAX_PACKET_SIZE
+try:
+    from paramiko import Transport
+    from paramiko.transport import DEFAULT_WINDOW_SIZE, DEFAULT_MAX_PACKET_SIZE
+except ImportError:
+    pass
 from openerp import api, SUPERUSER_ID
 from openerp.modules.registry import RegistryManager
 
diff --git a/document_sftp/tests/test_document_sftp.py b/document_sftp/tests/test_document_sftp.py
index 0dfedb27..24a7e8bc 100644
--- a/document_sftp/tests/test_document_sftp.py
+++ b/document_sftp/tests/test_document_sftp.py
@@ -6,7 +6,7 @@ import paramiko
 from openerp import tools
 from openerp.modules.registry import RegistryManager
 from openerp.tests.common import TransactionCase
-from openerp.addons.document_sftp.models.document_sftp import _db2thread
+from ..models.document_sftp import _db2thread
 from ..hooks import post_init_hook