diff --git a/src/fakeprinter/Pipfile b/src/fakeprinter/Pipfile
index 2b41b7c7..7584f4a8 100644
--- a/src/fakeprinter/Pipfile
+++ b/src/fakeprinter/Pipfile
@@ -5,7 +5,7 @@ verify_ssl = true
 
 [dev-packages]
 pylint = "*"
-black = "==19.*"
+black = "==20.*"
 
 [packages]
 flask = "*"
diff --git a/src/fakeprinter/Pipfile.lock b/src/fakeprinter/Pipfile.lock
index 84c2124f..5aa55367 100644
--- a/src/fakeprinter/Pipfile.lock
+++ b/src/fakeprinter/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "d1b6c566b98c03b853b2f495779e4879c21a11b47dcb305468bd1f5b731b5e0e"
+            "sha256": "73f5840fab0476dd48dff0709ced1e15cf17657b10dd78648ca62f4be8e48390"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -144,20 +144,12 @@
             ],
             "version": "==2.4.2"
         },
-        "attrs": {
-            "hashes": [
-                "sha256:26b54ddbbb9ee1d34d5d3668dd37d6cf74990ab23c828c2888dccdceee395594",
-                "sha256:fce7fc47dfc976152e82d53ff92fa0407700c21acd20886a13777a0d20e655dc"
-            ],
-            "version": "==20.2.0"
-        },
         "black": {
             "hashes": [
-                "sha256:1b30e59be925fafc1ee4565e5e08abef6b03fe455102883820fe5ee2e4734e0b",
-                "sha256:c2edb73a08e9e0e6f65a0e6af18b059b8b1cdd5bef997d7a0b181df93dc81539"
+                "sha256:1c02557aa099101b9d21496f8a914e9ed2222ef70336404eeeac8edba836fbea"
             ],
             "index": "pypi",
-            "version": "==19.10b0"
+            "version": "==20.8b1"
         },
         "click": {
             "hashes": [
@@ -168,10 +160,10 @@
         },
         "isort": {
             "hashes": [
-                "sha256:92533892058de0306e51c88f22ece002a209dc8e80288aa3cec6d443060d584f",
-                "sha256:a200d47b7ee8b7f7d0a9646650160c4a51b6a91a9413fd31b1da2c4de789f5d3"
+                "sha256:dcab1d98b469a12a1a624ead220584391648790275560e1a43e54c5dceae65e7",
+                "sha256:dcaeec1b5f0eca77faea2a35ab790b4f3680ff75590bfcb7145986905aab2f58"
             ],
-            "version": "==5.5.1"
+            "version": "==5.6.4"
         },
         "lazy-object-proxy": {
             "hashes": [
@@ -206,12 +198,19 @@
             ],
             "version": "==0.6.1"
         },
+        "mypy-extensions": {
+            "hashes": [
+                "sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d",
+                "sha256:2d82818f5bb3e369420cb3c4060a7970edba416647068eb4c5343488a6c604a8"
+            ],
+            "version": "==0.4.3"
+        },
         "pathspec": {
             "hashes": [
-                "sha256:7d91249d21749788d07a2d0f94147accd8f845507400749ea19c1ec9054a12b0",
-                "sha256:da45173eb3a6f2a5a487efba21f050af2b41948be6ab52b6a1e3ff22bb8b7061"
+                "sha256:86379d6b86d75816baba717e64b1a3a3469deb93bb76d613c9ce79edc5cb68fd",
+                "sha256:aa0cb481c4041bf52ffa7b0d8fa6cd3e88a2ca4879c533c9153882ee2556790d"
             ],
-            "version": "==0.8.0"
+            "version": "==0.8.1"
         },
         "pylint": {
             "hashes": [
@@ -223,29 +222,51 @@
         },
         "regex": {
             "hashes": [
-                "sha256:0dc64ee3f33cd7899f79a8d788abfbec168410be356ed9bd30bbd3f0a23a7204",
-                "sha256:1269fef3167bb52631ad4fa7dd27bf635d5a0790b8e6222065d42e91bede4162",
-                "sha256:14a53646369157baa0499513f96091eb70382eb50b2c82393d17d7ec81b7b85f",
-                "sha256:3a3af27a8d23143c49a3420efe5b3f8cf1a48c6fc8bc6856b03f638abc1833bb",
-                "sha256:46bac5ca10fb748d6c55843a931855e2727a7a22584f302dd9bb1506e69f83f6",
-                "sha256:4c037fd14c5f4e308b8370b447b469ca10e69427966527edcab07f52d88388f7",
-                "sha256:51178c738d559a2d1071ce0b0f56e57eb315bcf8f7d4cf127674b533e3101f88",
-                "sha256:5ea81ea3dbd6767873c611687141ec7b06ed8bab43f68fad5b7be184a920dc99",
-                "sha256:6961548bba529cac7c07af2fd4d527c5b91bb8fe18995fed6044ac22b3d14644",
-                "sha256:75aaa27aa521a182824d89e5ab0a1d16ca207318a6b65042b046053cfc8ed07a",
-                "sha256:7a2dd66d2d4df34fa82c9dc85657c5e019b87932019947faece7983f2089a840",
-                "sha256:8a51f2c6d1f884e98846a0a9021ff6861bdb98457879f412fdc2b42d14494067",
-                "sha256:9c568495e35599625f7b999774e29e8d6b01a6fb684d77dee1f56d41b11b40cd",
-                "sha256:9eddaafb3c48e0900690c1727fba226c4804b8e6127ea409689c3bb492d06de4",
-                "sha256:bbb332d45b32df41200380fff14712cb6093b61bd142272a10b16778c418e98e",
-                "sha256:bc3d98f621898b4a9bc7fecc00513eec8f40b5b83913d74ccb445f037d58cd89",
-                "sha256:c11d6033115dc4887c456565303f540c44197f4fc1a2bfb192224a301534888e",
-                "sha256:c50a724d136ec10d920661f1442e4a8b010a4fe5aebd65e0c2241ea41dbe93dc",
-                "sha256:d0a5095d52b90ff38592bbdc2644f17c6d495762edf47d876049cfd2968fbccf",
-                "sha256:d6cff2276e502b86a25fd10c2a96973fdb45c7a977dca2138d661417f3728341",
-                "sha256:e46d13f38cfcbb79bfdb2964b0fe12561fe633caf964a77a5f8d4e45fe5d2ef7"
+                "sha256:03855ee22980c3e4863dc84c42d6d2901133362db5daf4c36b710dd895d78f0a",
+                "sha256:06b52815d4ad38d6524666e0d50fe9173533c9cc145a5779b89733284e6f688f",
+                "sha256:11116d424734fe356d8777f89d625f0df783251ada95d6261b4c36ad27a394bb",
+                "sha256:119e0355dbdd4cf593b17f2fc5dbd4aec2b8899d0057e4957ba92f941f704bf5",
+                "sha256:127a9e0c0d91af572fbb9e56d00a504dbd4c65e574ddda3d45b55722462210de",
+                "sha256:1ec66700a10e3c75f1f92cbde36cca0d3aaee4c73dfa26699495a3a30b09093c",
+                "sha256:227a8d2e5282c2b8346e7f68aa759e0331a0b4a890b55a5cfbb28bd0261b84c0",
+                "sha256:2564def9ce0710d510b1fc7e5178ce2d20f75571f788b5197b3c8134c366f50c",
+                "sha256:297116e79074ec2a2f885d22db00ce6e88b15f75162c5e8b38f66ea734e73c64",
+                "sha256:2dc522e25e57e88b4980d2bdd334825dbf6fa55f28a922fc3bfa60cc09e5ef53",
+                "sha256:3a5f08039eee9ea195a89e180c5762bfb55258bfb9abb61a20d3abee3b37fd12",
+                "sha256:3dfca201fa6b326239e1bccb00b915e058707028809b8ecc0cf6819ad233a740",
+                "sha256:49461446b783945597c4076aea3f49aee4b4ce922bd241e4fcf62a3e7c61794c",
+                "sha256:4afa350f162551cf402bfa3cd8302165c8e03e689c897d185f16a167328cc6dd",
+                "sha256:4b5a9bcb56cc146c3932c648603b24514447eafa6ce9295234767bf92f69b504",
+                "sha256:52e83a5f28acd621ba8e71c2b816f6541af7144b69cc5859d17da76c436a5427",
+                "sha256:625116aca6c4b57c56ea3d70369cacc4d62fead4930f8329d242e4fe7a58ce4b",
+                "sha256:654c1635f2313d0843028487db2191530bca45af61ca85d0b16555c399625b0e",
+                "sha256:8092a5a06ad9a7a247f2a76ace121183dc4e1a84c259cf9c2ce3bbb69fac3582",
+                "sha256:832339223b9ce56b7b15168e691ae654d345ac1635eeb367ade9ecfe0e66bee0",
+                "sha256:8ca9dca965bd86ea3631b975d63b0693566d3cc347e55786d5514988b6f5b84c",
+                "sha256:96f99219dddb33e235a37283306834700b63170d7bb2a1ee17e41c6d589c8eb9",
+                "sha256:9b6305295b6591e45f069d3553c54d50cc47629eb5c218aac99e0f7fafbf90a1",
+                "sha256:a62162be05edf64f819925ea88d09d18b09bebf20971b363ce0c24e8b4aa14c0",
+                "sha256:aacc8623ffe7999a97935eeabbd24b1ae701d08ea8f874a6ff050e93c3e658cf",
+                "sha256:b45bab9f224de276b7bc916f6306b86283f6aa8afe7ed4133423efb42015a898",
+                "sha256:b88fa3b8a3469f22b4f13d045d9bd3eda797aa4e406fde0a2644bc92bbdd4bdd",
+                "sha256:b8a686a6c98872007aa41fdbb2e86dc03b287d951ff4a7f1da77fb7f14113e4d",
+                "sha256:bd904c0dec29bbd0769887a816657491721d5f545c29e30fd9d7a1a275dc80ab",
+                "sha256:bf4f896c42c63d1f22039ad57de2644c72587756c0cfb3cc3b7530cfe228277f",
+                "sha256:c13d311a4c4a8d671f5860317eb5f09591fbe8259676b86a85769423b544451e",
+                "sha256:c2c6c56ee97485a127555c9595c069201b5161de9d05495fbe2132b5ac104786",
+                "sha256:c32c91a0f1ac779cbd73e62430de3d3502bbc45ffe5bb6c376015acfa848144b",
+                "sha256:c3466a84fce42c2016113101018a9981804097bacbab029c2d5b4fcb224b89de",
+                "sha256:c454ad88e56e80e44f824ef8366bb7e4c3def12999151fd5c0ea76a18fe9aa3e",
+                "sha256:c8a2b7ccff330ae4c460aff36626f911f918555660cc28163417cb84ffb25789",
+                "sha256:cb905f3d2e290a8b8f1579d3984f2cfa7c3a29cc7cba608540ceeed18513f520",
+                "sha256:cfcf28ed4ce9ced47b9b9670a4f0d3d3c0e4d4779ad4dadb1ad468b097f808aa",
+                "sha256:dd3e6547ecf842a29cf25123fbf8d2461c53c8d37aa20d87ecee130c89b7079b",
+                "sha256:de7fd57765398d141949946c84f3590a68cf5887dac3fc52388df0639b01eda4",
+                "sha256:ea37320877d56a7f0a1e6a625d892cf963aa7f570013499f5b8d5ab8402b5625",
+                "sha256:f1fce1e4929157b2afeb4bb7069204d4370bab9f4fc03ca1fbec8bd601f8c87d",
+                "sha256:f43109822df2d3faac7aad79613f5f02e4eab0fc8ad7932d2e70e2a83bd49c26"
             ],
-            "version": "==2020.7.14"
+            "version": "==2020.10.28"
         },
         "six": {
             "hashes": [
@@ -256,38 +277,55 @@
         },
         "toml": {
             "hashes": [
-                "sha256:926b612be1e5ce0634a2ca03470f95169cf16f939018233a670519cb4ac58b0f",
-                "sha256:bda89d5935c2eac546d648028b9901107a595863cb36bae0c73ac804a9b4ce88"
+                "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b",
+                "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"
             ],
-            "version": "==0.10.1"
+            "version": "==0.10.2"
         },
         "typed-ast": {
             "hashes": [
                 "sha256:0666aa36131496aed8f7be0410ff974562ab7eeac11ef351def9ea6fa28f6355",
                 "sha256:0c2c07682d61a629b68433afb159376e24e5b2fd4641d35424e462169c0a7919",
+                "sha256:0d8110d78a5736e16e26213114a38ca35cb15b6515d535413b090bd50951556d",
                 "sha256:249862707802d40f7f29f6e1aad8d84b5aa9e44552d2cc17384b209f091276aa",
                 "sha256:24995c843eb0ad11a4527b026b4dde3da70e1f2d8806c99b7b4a7cf491612652",
                 "sha256:269151951236b0f9a6f04015a9004084a5ab0d5f19b57de779f908621e7d8b75",
+                "sha256:3742b32cf1c6ef124d57f95be609c473d7ec4c14d0090e5a5e05a15269fb4d0c",
                 "sha256:4083861b0aa07990b619bd7ddc365eb7fa4b817e99cf5f8d9cf21a42780f6e01",
                 "sha256:498b0f36cc7054c1fead3d7fc59d2150f4d5c6c56ba7fb150c013fbc683a8d2d",
                 "sha256:4e3e5da80ccbebfff202a67bf900d081906c358ccc3d5e3c8aea42fdfdfd51c1",
                 "sha256:6daac9731f172c2a22ade6ed0c00197ee7cc1221aa84cfdf9c31defeb059a907",
                 "sha256:715ff2f2df46121071622063fc7543d9b1fd19ebfc4f5c8895af64a77a8c852c",
                 "sha256:73d785a950fc82dd2a25897d525d003f6378d1cb23ab305578394694202a58c3",
+                "sha256:7e4c9d7658aaa1fc80018593abdf8598bf91325af6af5cce4ce7c73bc45ea53d",
                 "sha256:8c8aaad94455178e3187ab22c8b01a3837f8ee50e09cf31f1ba129eb293ec30b",
                 "sha256:8ce678dbaf790dbdb3eba24056d5364fb45944f33553dd5869b7580cdbb83614",
+                "sha256:92c325624e304ebf0e025d1224b77dd4e6393f18aab8d829b5b7e04afe9b7a2c",
                 "sha256:aaee9905aee35ba5905cfb3c62f3e83b3bec7b39413f0a7f19be4e547ea01ebb",
+                "sha256:b52ccf7cfe4ce2a1064b18594381bccf4179c2ecf7f513134ec2f993dd4ab395",
                 "sha256:bcd3b13b56ea479b3650b82cabd6b5343a625b0ced5429e4ccad28a8973f301b",
                 "sha256:c9e348e02e4d2b4a8b2eedb48210430658df6951fa484e59de33ff773fbd4b41",
                 "sha256:d205b1b46085271b4e15f670058ce182bd1199e56b317bf2ec004b6a44f911f6",
                 "sha256:d43943ef777f9a1c42bf4e552ba23ac77a6351de620aa9acf64ad54933ad4d34",
                 "sha256:d5d33e9e7af3b34a40dc05f498939f0ebf187f07c385fd58d591c533ad8562fe",
+                "sha256:d648b8e3bf2fe648745c8ffcee3db3ff903d0817a01a12dd6a6ea7a8f4889072",
+                "sha256:f208eb7aff048f6bea9586e61af041ddf7f9ade7caed625742af423f6bae3298",
+                "sha256:fac11badff8313e23717f3dada86a15389d0708275bddf766cca67a84ead3e91",
                 "sha256:fc0fea399acb12edbf8a628ba8d2312f583bdbdb3335635db062fa98cf71fca4",
+                "sha256:fcf135e17cc74dbfbc05894ebca928ffeb23d9790b3167a674921db19082401f",
                 "sha256:fe460b922ec15dd205595c9b5b99e2f056fd98ae8f9f56b888e7a17dc2b757e7"
             ],
             "markers": "implementation_name == 'cpython' and python_version < '3.8'",
             "version": "==1.4.1"
         },
+        "typing-extensions": {
+            "hashes": [
+                "sha256:7cb407020f00f7bfc3cb3e7881628838e69d8f3fcab2f64742a5e76b2f841918",
+                "sha256:99d4073b617d30288f569d3f13d2bd7548c3a7e4c8de87db09a9d29bb3a4a60c",
+                "sha256:dafc7639cde7f1b6e1acc0f457842a83e722ccca8eef5270af2d74792619a89f"
+            ],
+            "version": "==3.7.4.3"
+        },
         "wrapt": {
             "hashes": [
                 "sha256:b62ffa81fb85f4332a4f609cab4ac40709470da05643a082ec1eb88e6d9b97d7"