diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 10757e9..c4c613c 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,3 +1,7 @@
+2.0.3
+=====
+* Added support for authentication via client-side certificates
+
 2.0.2
 =====
 * Fixed contains functions
diff --git a/pyArango/connection.py b/pyArango/connection.py
index c56b700..c7fa332 100644
--- a/pyArango/connection.py
+++ b/pyArango/connection.py
@@ -83,6 +83,7 @@ def __init__(
             username,
             password,
             verify=True,
+            cert=None,
             max_conflict_retries=5,
             max_retries=5,
             single_session=True,
@@ -96,6 +97,7 @@ def __init__(
             self.auth = None
         self.pool_maxsize = pool_maxsize
         self.verify = verify
+        self.cert = cert
         self.max_retries = max_retries
         self.log_requests = log_requests
         self.max_conflict_retries = max_conflict_retries
@@ -122,6 +124,8 @@ def _make_session(self):
         https = requests.adapters.HTTPAdapter(**kwargs)
         session.mount('http://', http)
         session.mount('https://', https)
+        if self.cert:
+            session.cert = self.cert
 
         return session
 
@@ -198,6 +202,7 @@ def __init__(
             username=None,
             password=None,
             verify=True,
+            cert=None,
             verbose=False,
             statsdClient=None,
             reportFileName=None,
@@ -241,7 +246,7 @@ def __init__(
         self.identifier = None
         self.startTime = None
         self.session = None
-        self.resetSession(username, password, verify)
+        self.resetSession(username, password, verify, cert)
 
         self.users = Users(self)
 
@@ -295,12 +300,14 @@ def create_aikido_session(
             self,
             username,
             password,
-            verify
+            verify,
+            cert
     ) -> AikidoSession:
         return AikidoSession(
             username=username,
             password=password,
             verify=verify,
+            cert=cert,
             single_session=True,
             max_conflict_retries=self.max_conflict_retries,
             max_retries=self.max_retries,
@@ -324,10 +331,12 @@ def create_grequest_session(
             verify
         )
 
-    def resetSession(self, username=None, password=None, verify=True):
+    def resetSession(self, username=None, password=None, verify=True, cert=None):
         """resets the session"""
         self.disconnectSession()
         if self.use_grequests:
+            if cert is not None:
+                raise NotImplementedError('client-side certificates not supported in conjunction with grequests yet')
             self.session = self.create_grequest_session(
                 username,
                 password,
@@ -337,7 +346,8 @@ def resetSession(self, username=None, password=None, verify=True):
             self.session = self.create_aikido_session(
                 username,
                 password,
-                verify
+                verify,
+                cert
             )
 
     def reload(self):