diff --git a/conekta/__init__.py b/conekta/__init__.py
index e7bb645..62e9cbb 100644
--- a/conekta/__init__.py
+++ b/conekta/__init__.py
@@ -2,6 +2,7 @@
 #coding: utf-8
 #(c) 2013 Julian Ceballos <@jceb>
 
+import os
 import base64
 import inspect
 import urllib
@@ -42,10 +43,14 @@ def __setitem__(self, key, value):
         self.__dict__[key] = value
 
     @classmethod
-    def build_request(cls, method, path, params):
-        HEADERS['Authorization'] = 'Basic %s' % (base64.b64encode(api_key + ':'))
+    def build_request(cls, method, path, params, _api_key=None):
+        if _api_key is None:
+            HEADERS['Authorization'] = 'Basic %s' % (base64.b64encode(api_key + ':'))
+        else:
+            HEADERS['Authorization'] = 'Basic %s' % (base64.b64encode(_api_key + ':'))
+        
         absolute_url = API_BASE + path
-        request = Http({}).request
+        request = Http(ca_certs=os.path.join(os.path.dirname(__file__), 'ssl_data/ca_bundle.crt')).request
         if method == 'GET':
             if params is None:
                 url = absolute_url
@@ -68,8 +73,8 @@ def build_request(cls, method, path, params):
         raise ConektaError(json.loads(body))
 
     @classmethod
-    def load_url(cls, path, method='GET', params=None):
-        response = cls.build_request(method, path, params)
+    def load_url(cls, path, method='GET', params=None, api_key=None):
+        response = cls.build_request(method, path, params, _api_key = api_key)
         return response
 
     @classmethod
@@ -98,12 +103,12 @@ def construct_from(self, attributes):
             self.__dict__[key] = attributes[key]
 
 
-    def refresh(self, url=None, method='POST', params=None):
+    def refresh(self, url=None, method='POST', params=None, api_key=None):
         if url is None:
             url = self.instance_url()
             method = 'GET'
 
-        response = self.load_url(url, method=method, params=params)
+        response = self.load_url(url, method=method, params=params, api_key=api_key)
 
         self.construct_from(response)
 
@@ -111,31 +116,31 @@ def refresh(self, url=None, method='POST', params=None):
 
 class _CreateableResource(_Resource):
     @classmethod
-    def create(cls, params):
+    def create(cls, params, api_key=None):
         endpoint = cls.class_url()
-        return cls(cls.load_url(endpoint, method='POST', params=params))
+        return cls(cls.load_url(endpoint, method='POST', params=params, api_key=api_key))
 
 class _ListableResource(_Resource):
     @classmethod
-    def retrieve(cls, _id):
+    def retrieve(cls, _id, api_key=None):
         endpoint = cls.class_url()
-        return cls(cls.load_url("%s/%s" % (endpoint, _id) ))
+        return cls(cls.load_url("%s/%s" % (endpoint, _id), api_key=api_key ))
 
     @classmethod
-    def all(cls, query={}, limit=10, offset=0, sort=[]):
+    def all(cls, query={}, limit=10, offset=0, sort=[], api_key=None):
         endpoint = cls.class_url()
         query['limit'] = limit
         query['offset'] = offset
         query['sort'] = sort
-        return [cls(attributes) for attributes in cls.load_url(endpoint, 'GET', query)]
+        return [cls(attributes) for attributes in cls.load_url(endpoint, 'GET', query, api_key=api_key)]
 
 
 class Charge(_CreateableResource, _ListableResource):
-    def refund(self, amount=None):
+    def refund(self, amount=None, api_key=None):
         if amount is None:
-            return self.refresh("%s/refund" % self.instance_url())
+            return self.refresh("%s/refund" % self.instance_url(), api_key=api_key)
         else:
-            return self.refresh("%s/refund" % self.instance_url(), 'POST', {'amount':amount})
+            return self.refresh("%s/refund" % self.instance_url(), 'POST', {'amount':amount}, api_key=api_key)
 
 class Log(_ListableResource): pass
 
diff --git a/conekta/ssl_data/ca_bundle.crt b/conekta/ssl_data/ca_bundle.crt
new file mode 100644
index 0000000..fe3a04a
--- /dev/null
+++ b/conekta/ssl_data/ca_bundle.crt
@@ -0,0 +1,66 @@
+#Bundled Digicerts
+DigiCert Assured ID Root CA
+===========================
+-----BEGIN CERTIFICATE-----
+MIIDtzCCAp+gAwIBAgIQDOfg5RfYRv6P5WD8G/AwOTANBgkqhkiG9w0BAQUFADBlMQswCQYDVQQG
+EwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMSQw
+IgYDVQQDExtEaWdpQ2VydCBBc3N1cmVkIElEIFJvb3QgQ0EwHhcNMDYxMTEwMDAwMDAwWhcNMzEx
+MTEwMDAwMDAwWjBlMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQL
+ExB3d3cuZGlnaWNlcnQuY29tMSQwIgYDVQQDExtEaWdpQ2VydCBBc3N1cmVkIElEIFJvb3QgQ0Ew
+ggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCtDhXO5EOAXLGH87dg+XESpa7cJpSIqvTO
+9SA5KFhgDPiA2qkVlTJhPLWxKISKityfCgyDF3qPkKyK53lTXDGEKvYPmDI2dsze3Tyoou9q+yHy
+UmHfnyDXH+Kx2f4YZNISW1/5WBg1vEfNoTb5a3/UsDg+wRvDjDPZ2C8Y/igPs6eD1sNuRMBhNZYW
+/lmci3Zt1/GiSw0r/wty2p5g0I6QNcZ4VYcgoc/lbQrISXwxmDNsIumH0DJaoroTghHtORedmTpy
+oeb6pNnVFzF1roV9Iq4/AUaG9ih5yLHa5FcXxH4cDrC0kqZWs72yl+2qp/C3xag/lRbQ/6GW6whf
+GHdPAgMBAAGjYzBhMA4GA1UdDwEB/wQEAwIBhjAPBgNVHRMBAf8EBTADAQH/MB0GA1UdDgQWBBRF
+66Kv9JLLgjEtUYunpyGd823IDzAfBgNVHSMEGDAWgBRF66Kv9JLLgjEtUYunpyGd823IDzANBgkq
+hkiG9w0BAQUFAAOCAQEAog683+Lt8ONyc3pklL/3cmbYMuRCdWKuh+vy1dneVrOfzM4UKLkNl2Bc
+EkxY5NM9g0lFWJc1aRqoR+pWxnmrEthngYTffwk8lOa4JiwgvT2zKIn3X/8i4peEH+ll74fg38Fn
+SbNd67IJKusm7Xi+fT8r87cmNW1fiQG2SVufAQWbqz0lwcy2f8Lxb4bG+mRo64EtlOtCt/qMHt1i
+8b5QZ7dsvfPxH2sMNgcWfzd8qVttevESRmCD1ycEvkvOl77DZypoEd+A5wwzZr8TDRRu838fYxAe
++o0bJW1sj6W3YQGx0qMmoRBxna3iw/nDmVG3KwcIzi7mULKn+gpFL6Lw8g==
+-----END CERTIFICATE-----
+
+DigiCert Global Root CA
+=======================
+-----BEGIN CERTIFICATE-----
+MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBhMQswCQYDVQQG
+EwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMSAw
+HgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBDQTAeFw0wNjExMTAwMDAwMDBaFw0zMTExMTAw
+MDAwMDBaMGExCzAJBgNVBAYTAlVTMRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3
+dy5kaWdpY2VydC5jb20xIDAeBgNVBAMTF0RpZ2lDZXJ0IEdsb2JhbCBSb290IENBMIIBIjANBgkq
+hkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4jvhEXLeqKTTo1eqUKKPC3eQyaKl7hLOllsBCSDMAZOn
+TjC3U/dDxGkAV53ijSLdhwZAAIEJzs4bg7/fzTtxRuLWZscFs3YnFo97nh6Vfe63SKMI2tavegw5
+BmV/Sl0fvBf4q77uKNd0f3p4mVmFaG5cIzJLv07A6Fpt43C/dxC//AH2hdmoRBBYMql1GNXRor5H
+4idq9Joz+EkIYIvUX7Q6hL+hqkpMfT7PT19sdl6gSzeRntwi5m3OFBqOasv+zbMUZBfHWymeMr/y
+7vrTC0LUq7dBMtoM1O/4gdW7jVg/tRvoSSiicNoxBN33shbyTApOB6jtSj1etX+jkMOvJwIDAQAB
+o2MwYTAOBgNVHQ8BAf8EBAMCAYYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUA95QNVbRTLtm
+8KPiGxvDl7I90VUwHwYDVR0jBBgwFoAUA95QNVbRTLtm8KPiGxvDl7I90VUwDQYJKoZIhvcNAQEF
+BQADggEBAMucN6pIExIK+t1EnE9SsPTfrgT1eXkIoyQY/EsrhMAtudXH/vTBH1jLuG2cenTnmCmr
+EbXjcKChzUyImZOMkXDiqw8cvpOp/2PV5Adg06O/nVsJ8dWO41P0jmP6P6fbtGbfYmbW0W5BjfIt
+tep3Sp+dWOIrWcBAI+0tKIJFPnlUkiaY4IBIqDfv8NZ5YBberOgOzW6sRBc4L0na4UU+Krk2U886
+UAb3LujEV0lsYSEY1QSteDwsOoBrp+uvFRTp2InBuThs4pFsiv9kuXclVzDAGySj4dzp30d8tbQk
+CAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4=
+-----END CERTIFICATE-----
+
+DigiCert High Assurance EV Root CA
+==================================
+-----BEGIN CERTIFICATE-----
+MIIDxTCCAq2gAwIBAgIQAqxcJmoLQJuPC3nyrkYldzANBgkqhkiG9w0BAQUFADBsMQswCQYDVQQG
+EwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMSsw
+KQYDVQQDEyJEaWdpQ2VydCBIaWdoIEFzc3VyYW5jZSBFViBSb290IENBMB4XDTA2MTExMDAwMDAw
+MFoXDTMxMTExMDAwMDAwMFowbDELMAkGA1UEBhMCVVMxFTATBgNVBAoTDERpZ2lDZXJ0IEluYzEZ
+MBcGA1UECxMQd3d3LmRpZ2ljZXJ0LmNvbTErMCkGA1UEAxMiRGlnaUNlcnQgSGlnaCBBc3N1cmFu
+Y2UgRVYgUm9vdCBDQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMbM5XPm+9S75S0t
+Mqbf5YE/yc0lSbZxKsPVlDRnogocsF9ppkCxxLeyj9CYpKlBWTrT3JTWPNt0OKRKzE0lgvdKpVMS
+OO7zSW1xkX5jtqumX8OkhPhPYlG++MXs2ziS4wblCJEMxChBVfvLWokVfnHoNb9Ncgk9vjo4UFt3
+MRuNs8ckRZqnrG0AFFoEt7oT61EKmEFBIk5lYYeBQVCmeVyJ3hlKV9Uu5l0cUyx+mM0aBhakaHPQ
+NAQTXKFx01p8VdteZOE3hzBWBOURtCmAEvF5OYiiAhF8J2a3iLd48soKqDirCmTCv2ZdlYTBoSUe
+h10aUAsgEsxBu24LUTi4S8sCAwEAAaNjMGEwDgYDVR0PAQH/BAQDAgGGMA8GA1UdEwEB/wQFMAMB
+Af8wHQYDVR0OBBYEFLE+w2kD+L9HAdSYJhoIAu9jZCvDMB8GA1UdIwQYMBaAFLE+w2kD+L9HAdSY
+JhoIAu9jZCvDMA0GCSqGSIb3DQEBBQUAA4IBAQAcGgaX3NecnzyIZgYIVyHbIUf4KmeqvxgydkAQ
+V8GK83rZEWWONfqe/EW1ntlMMUu4kehDLI6zeM7b41N5cdblIZQB2lWHmiRk9opmzN6cN82oNLFp
+myPInngiK3BD41VHMWEZ71jFhS9OMPagMRYjyOfiZRYzy78aG6A9+MpeizGLYAiJLQwGXFK3xPkK
+mNEVX58Svnw2Yzi9RKR/5CYrCsSXaQ3pjOLAEFe4yHYSkVXySGnYvCoCWw9E1CAx2/S6cCZdkGCe
+vEsXCS+0yx5DaMkHJ8HSXPfqIbloEpw8nL+e/IBcm2PN7EeqJSdnoDfzAIJ9VNep+OkuE6N36B9K
+-----END CERTIFICATE-----
\ No newline at end of file