diff --git a/Pipfile b/Pipfile
index 2fb4563..13ff107 100644
--- a/Pipfile
+++ b/Pipfile
@@ -9,6 +9,7 @@ pytest = "*"
 [packages]
 apns2 = "==0.7.1"
 bugsnag = "==4.0.2"
+cryptography = "==3.3.2"
 gunicorn = "==20.0.4"
 invoke = "==1.5.0"
 peewee = "==3.14.0"
diff --git a/Pipfile.lock b/Pipfile.lock
index e40e426..6ffe324 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "7a802857e43a0b37d0031a4c2aee6c2af6b0b3addaa3a3811be00b3fea88708d"
+            "sha256": "88ac4368e70e0df2ca43dc74703674f6ea543ab0d0966360b9b6307a5e19aa0d"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -34,51 +34,52 @@
         },
         "cffi": {
             "hashes": [
-                "sha256:00a1ba5e2e95684448de9b89888ccd02c98d512064b4cb987d48f4b40aa0421e",
-                "sha256:00e28066507bfc3fe865a31f325c8391a1ac2916219340f87dfad602c3e48e5d",
-                "sha256:045d792900a75e8b1e1b0ab6787dd733a8190ffcf80e8c8ceb2fb10a29ff238a",
-                "sha256:0638c3ae1a0edfb77c6765d487fee624d2b1ee1bdfeffc1f0b58c64d149e7eec",
-                "sha256:105abaf8a6075dc96c1fe5ae7aae073f4696f2905fde6aeada4c9d2926752362",
-                "sha256:155136b51fd733fa94e1c2ea5211dcd4c8879869008fc811648f16541bf99668",
-                "sha256:1a465cbe98a7fd391d47dce4b8f7e5b921e6cd805ef421d04f5f66ba8f06086c",
-                "sha256:1d2c4994f515e5b485fd6d3a73d05526aa0fcf248eb135996b088d25dfa1865b",
-                "sha256:2c24d61263f511551f740d1a065eb0212db1dbbbbd241db758f5244281590c06",
-                "sha256:51a8b381b16ddd370178a65360ebe15fbc1c71cf6f584613a7ea08bfad946698",
-                "sha256:594234691ac0e9b770aee9fcdb8fa02c22e43e5c619456efd0d6c2bf276f3eb2",
-                "sha256:5cf4be6c304ad0b6602f5c4e90e2f59b47653ac1ed9c662ed379fe48a8f26b0c",
-                "sha256:64081b3f8f6f3c3de6191ec89d7dc6c86a8a43911f7ecb422c60e90c70be41c7",
-                "sha256:6bc25fc545a6b3d57b5f8618e59fc13d3a3a68431e8ca5fd4c13241cd70d0009",
-                "sha256:798caa2a2384b1cbe8a2a139d80734c9db54f9cc155c99d7cc92441a23871c03",
-                "sha256:7c6b1dece89874d9541fc974917b631406233ea0440d0bdfbb8e03bf39a49b3b",
-                "sha256:7ef7d4ced6b325e92eb4d3502946c78c5367bc416398d387b39591532536734e",
-                "sha256:840793c68105fe031f34d6a086eaea153a0cd5c491cde82a74b420edd0a2b909",
-                "sha256:8d6603078baf4e11edc4168a514c5ce5b3ba6e3e9c374298cb88437957960a53",
-                "sha256:9cc46bc107224ff5b6d04369e7c595acb700c3613ad7bcf2e2012f62ece80c35",
-                "sha256:9f7a31251289b2ab6d4012f6e83e58bc3b96bd151f5b5262467f4bb6b34a7c26",
-                "sha256:9ffb888f19d54a4d4dfd4b3f29bc2c16aa4972f1c2ab9c4ab09b8ab8685b9c2b",
-                "sha256:a5ed8c05548b54b998b9498753fb9cadbfd92ee88e884641377d8a8b291bcc01",
-                "sha256:a7711edca4dcef1a75257b50a2fbfe92a65187c47dab5a0f1b9b332c5919a3fb",
-                "sha256:af5c59122a011049aad5dd87424b8e65a80e4a6477419c0c1015f73fb5ea0293",
-                "sha256:b18e0a9ef57d2b41f5c68beefa32317d286c3d6ac0484efd10d6e07491bb95dd",
-                "sha256:b4e248d1087abf9f4c10f3c398896c87ce82a9856494a7155823eb45a892395d",
-                "sha256:ba4e9e0ae13fc41c6b23299545e5ef73055213e466bd107953e4a013a5ddd7e3",
-                "sha256:c6332685306b6417a91b1ff9fae889b3ba65c2292d64bd9245c093b1b284809d",
-                "sha256:d5ff0621c88ce83a28a10d2ce719b2ee85635e85c515f12bac99a95306da4b2e",
-                "sha256:d9efd8b7a3ef378dd61a1e77367f1924375befc2eba06168b6ebfa903a5e59ca",
-                "sha256:df5169c4396adc04f9b0a05f13c074df878b6052430e03f50e68adf3a57aa28d",
-                "sha256:ebb253464a5d0482b191274f1c8bf00e33f7e0b9c66405fbffc61ed2c839c775",
-                "sha256:ec80dc47f54e6e9a78181ce05feb71a0353854cc26999db963695f950b5fb375",
-                "sha256:f032b34669220030f905152045dfa27741ce1a6db3324a5bc0b96b6c7420c87b",
-                "sha256:f60567825f791c6f8a592f3c6e3bd93dd2934e3f9dac189308426bd76b00ef3b",
-                "sha256:f803eaa94c2fcda012c047e62bc7a51b0bdabda1cad7a92a522694ea2d76e49f"
+                "sha256:005a36f41773e148deac64b08f233873a4d0c18b053d37da83f6af4d9087b813",
+                "sha256:0857f0ae312d855239a55c81ef453ee8fd24136eaba8e87a2eceba644c0d4c06",
+                "sha256:1071534bbbf8cbb31b498d5d9db0f274f2f7a865adca4ae429e147ba40f73dea",
+                "sha256:158d0d15119b4b7ff6b926536763dc0714313aa59e320ddf787502c70c4d4bee",
+                "sha256:1f436816fc868b098b0d63b8920de7d208c90a67212546d02f84fe78a9c26396",
+                "sha256:2894f2df484ff56d717bead0a5c2abb6b9d2bf26d6960c4604d5c48bbc30ee73",
+                "sha256:29314480e958fd8aab22e4a58b355b629c59bf5f2ac2492b61e3dc06d8c7a315",
+                "sha256:34eff4b97f3d982fb93e2831e6750127d1355a923ebaeeb565407b3d2f8d41a1",
+                "sha256:35f27e6eb43380fa080dccf676dece30bef72e4a67617ffda586641cd4508d49",
+                "sha256:3d3dd4c9e559eb172ecf00a2a7517e97d1e96de2a5e610bd9b68cea3925b4892",
+                "sha256:43e0b9d9e2c9e5d152946b9c5fe062c151614b262fda2e7b201204de0b99e482",
+                "sha256:48e1c69bbacfc3d932221851b39d49e81567a4d4aac3b21258d9c24578280058",
+                "sha256:51182f8927c5af975fece87b1b369f722c570fe169f9880764b1ee3bca8347b5",
+                "sha256:58e3f59d583d413809d60779492342801d6e82fefb89c86a38e040c16883be53",
+                "sha256:5de7970188bb46b7bf9858eb6890aad302577a5f6f75091fd7cdd3ef13ef3045",
+                "sha256:65fa59693c62cf06e45ddbb822165394a288edce9e276647f0046e1ec26920f3",
+                "sha256:69e395c24fc60aad6bb4fa7e583698ea6cc684648e1ffb7fe85e3c1ca131a7d5",
+                "sha256:6c97d7350133666fbb5cf4abdc1178c812cb205dc6f41d174a7b0f18fb93337e",
+                "sha256:6e4714cc64f474e4d6e37cfff31a814b509a35cb17de4fb1999907575684479c",
+                "sha256:72d8d3ef52c208ee1c7b2e341f7d71c6fd3157138abf1a95166e6165dd5d4369",
+                "sha256:8ae6299f6c68de06f136f1f9e69458eae58f1dacf10af5c17353eae03aa0d827",
+                "sha256:8b198cec6c72df5289c05b05b8b0969819783f9418e0409865dac47288d2a053",
+                "sha256:99cd03ae7988a93dd00bcd9d0b75e1f6c426063d6f03d2f90b89e29b25b82dfa",
+                "sha256:9cf8022fb8d07a97c178b02327b284521c7708d7c71a9c9c355c178ac4bbd3d4",
+                "sha256:9de2e279153a443c656f2defd67769e6d1e4163952b3c622dcea5b08a6405322",
+                "sha256:9e93e79c2551ff263400e1e4be085a1210e12073a31c2011dbbda14bda0c6132",
+                "sha256:9ff227395193126d82e60319a673a037d5de84633f11279e336f9c0f189ecc62",
+                "sha256:a465da611f6fa124963b91bf432d960a555563efe4ed1cc403ba5077b15370aa",
+                "sha256:ad17025d226ee5beec591b52800c11680fca3df50b8b29fe51d882576e039ee0",
+                "sha256:afb29c1ba2e5a3736f1c301d9d0abe3ec8b86957d04ddfa9d7a6a42b9367e396",
+                "sha256:b85eb46a81787c50650f2392b9b4ef23e1f126313b9e0e9013b35c15e4288e2e",
+                "sha256:bb89f306e5da99f4d922728ddcd6f7fcebb3241fc40edebcb7284d7514741991",
+                "sha256:cbde590d4faaa07c72bf979734738f328d239913ba3e043b1e98fe9a39f8b2b6",
+                "sha256:cd2868886d547469123fadc46eac7ea5253ea7fcb139f12e1dfc2bbd406427d1",
+                "sha256:d42b11d692e11b6634f7613ad8df5d6d5f8875f5d48939520d351007b3c13406",
+                "sha256:f2d45f97ab6bb54753eab54fffe75aaf3de4ff2341c9daee1987ee1837636f1d",
+                "sha256:fd78e5fee591709f32ef6edb9a015b4aa1a5022598e36227500c8f4e02328d9c"
             ],
-            "version": "==1.14.4"
+            "version": "==1.14.5"
         },
         "click": {
             "hashes": [
                 "sha256:d2b5255c7c6349bc1bd1e59e08cd12acbbd63ce649f2588755783aa94dfb6b1a",
                 "sha256:dacca89f4bfadd5de3d7489b7c8a566eee0d3676333fbb50030263894c38c0dc"
             ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
             "version": "==7.1.2"
         },
         "cryptography": {
@@ -179,6 +180,7 @@
                 "sha256:2d475327684562c3a96cc71adf7dc8c4f0565175cf86b6d7a404ff4c771f15f0",
                 "sha256:7582ad22678f0fcd81102833f60ef8d0e57288b6b5fb00323d101be910e35705"
             ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.20"
         },
         "pyjwt": {
@@ -186,6 +188,7 @@
                 "sha256:a5c70a06e1f33d81ef25eecd50d50bd30e34de1ca8b2b9fa3fe0daaabcf69bf7",
                 "sha256:b70b15f89dc69b993d8a8d32c299032d5355c82f9b5b7e851d1a6d706dffe847"
             ],
+            "markers": "python_version >= '3.6'",
             "version": "==2.0.1"
         },
         "redis": {
@@ -225,14 +228,16 @@
                 "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259",
                 "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"
             ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==1.15.0"
         },
         "webob": {
             "hashes": [
-                "sha256:a3c89a8e9ba0aeb17382836cdb73c516d0ecf6630ec40ec28288f3ed459ce87b",
-                "sha256:aa3a917ed752ba3e0b242234b2a373f9c4e2a75d35291dcbe977649bd21fd108"
+                "sha256:73aae30359291c14fa3b956f8b5ca31960e420c28c1bec002547fb04928cf89b",
+                "sha256:b64ef5141be559cfade448f044fa45c2260351edcb6a8ef6b7e00c7dcef0c323"
             ],
-            "version": "==1.8.6"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==1.8.7"
         }
     },
     "develop": {
@@ -241,6 +246,7 @@
                 "sha256:31b2eced602aa8423c2aea9c76a724617ed67cf9513173fd3a4f03e3a929c7e6",
                 "sha256:832aa3cde19744e49938b91fea06d69ecb9e649c93ba974535d08ad92164f700"
             ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==20.3.0"
         },
         "iniconfig": {
@@ -255,6 +261,7 @@
                 "sha256:5b327ac1320dc863dca72f4514ecc086f31186744b84a230374cc1fd776feae5",
                 "sha256:67714da7f7bc052e064859c05c595155bd1ee9f69f76557e21f051443c20947a"
             ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==20.9"
         },
         "pluggy": {
@@ -262,6 +269,7 @@
                 "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0",
                 "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"
             ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==0.13.1"
         },
         "py": {
@@ -269,6 +277,7 @@
                 "sha256:21b81bda15b66ef5e1a777a21c4dcd9c20ad3efd0b3f817e7a809035269e1bd3",
                 "sha256:3b80836aa6d1feeaa108e046da6423ab8f6ceda6468545ae8d02d9d58d18818a"
             ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==1.10.0"
         },
         "pyparsing": {
@@ -276,21 +285,23 @@
                 "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1",
                 "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"
             ],
+            "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.4.7"
         },
         "pytest": {
             "hashes": [
-                "sha256:1969f797a1a0dbd8ccf0fecc80262312729afea9c17f1d70ebf85c5e76c6f7c8",
-                "sha256:66e419b1899bc27346cb2c993e12c5e5e8daba9073c1fbce33b9807abc95c306"
+                "sha256:9d1edf9e7d0b84d72ea3dbcdfd22b35fb543a5e8f2a60092dd578936bf63d7f9",
+                "sha256:b574b57423e818210672e07ca1fa90aaf194a4f63f3ab909a2c67ebb22913839"
             ],
             "index": "pypi",
-            "version": "==6.2.1"
+            "version": "==6.2.2"
         },
         "toml": {
             "hashes": [
                 "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b",
                 "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"
             ],
+            "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==0.10.2"
         }
     }