diff --git a/Pipfile.lock b/Pipfile.lock
index edf9a29..a3cf101 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -16,11 +16,11 @@
     "default": {
         "jinja2": {
             "hashes": [
-                "sha256:93187ffbc7808079673ef52771baa950426fd664d3aad1d0fa3e95644360e250",
-                "sha256:b0eaf100007721b5c16c1fc1eecb87409464edc10469ddc9a22a27a99123be49"
+                "sha256:03e47ad063331dd6a3f04a43eddca8a966a26ba0c5b7207a9a9e4e08f1b29419",
+                "sha256:a6d58433de0ae800347cab1fa3043cebbabe8baa9d29e668f1c768cb87a333c6"
             ],
             "index": "pypi",
-            "version": "==2.11.1"
+            "version": "==2.11.3"
         },
         "markupsafe": {
             "hashes": [
@@ -29,8 +29,12 @@
                 "sha256:09c4b7f37d6c648cb13f9230d847adf22f8171b1ccc4d5682398e77f40309235",
                 "sha256:1027c282dad077d0bae18be6794e6b6b8c91d58ed8a8d89a89d59693b9131db5",
                 "sha256:13d3144e1e340870b25e7b10b98d779608c02016d5184cfb9927a9f10c689f42",
+                "sha256:195d7d2c4fbb0ee8139a6cf67194f3973a6b3042d742ebe0a9ed36d8b6f0c07f",
+                "sha256:22c178a091fc6630d0d045bdb5992d2dfe14e3259760e713c490da5323866c39",
                 "sha256:24982cc2533820871eba85ba648cd53d8623687ff11cbb805be4ff7b4c971aff",
                 "sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b",
+                "sha256:2beec1e0de6924ea551859edb9e7679da6e4870d32cb766240ce17e0a0ba2014",
+                "sha256:3b8a6499709d29c2e2399569d96719a1b21dcd94410a586a18526b143ec8470f",
                 "sha256:43a55c2930bbc139570ac2452adf3d70cdbb3cfe5912c71cdce1c2c6bbd9c5d1",
                 "sha256:46c99d2de99945ec5cb54f23c8cd5689f6d7177305ebff350a58ce5f8de1669e",
                 "sha256:500d4957e52ddc3351cabf489e79c91c17f6e0899158447047588650b5e69183",
@@ -39,24 +43,39 @@
                 "sha256:62fe6c95e3ec8a7fad637b7f3d372c15ec1caa01ab47926cfdf7a75b40e0eac1",
                 "sha256:6788b695d50a51edb699cb55e35487e430fa21f1ed838122d722e0ff0ac5ba15",
                 "sha256:6dd73240d2af64df90aa7c4e7481e23825ea70af4b4922f8ede5b9e35f78a3b1",
+                "sha256:6f1e273a344928347c1290119b493a1f0303c52f5a5eae5f16d74f48c15d4a85",
+                "sha256:6fffc775d90dcc9aed1b89219549b329a9250d918fd0b8fa8d93d154918422e1",
                 "sha256:717ba8fe3ae9cc0006d7c451f0bb265ee07739daf76355d06366154ee68d221e",
                 "sha256:79855e1c5b8da654cf486b830bd42c06e8780cea587384cf6545b7d9ac013a0b",
                 "sha256:7c1699dfe0cf8ff607dbdcc1e9b9af1755371f92a68f706051cc8c37d447c905",
+                "sha256:7fed13866cf14bba33e7176717346713881f56d9d2bcebab207f7a036f41b850",
+                "sha256:84dee80c15f1b560d55bcfe6d47b27d070b4681c699c572af2e3c7cc90a3b8e0",
                 "sha256:88e5fcfb52ee7b911e8bb6d6aa2fd21fbecc674eadd44118a9cc3863f938e735",
                 "sha256:8defac2f2ccd6805ebf65f5eeb132adcf2ab57aa11fdf4c0dd5169a004710e7d",
+                "sha256:98bae9582248d6cf62321dcb52aaf5d9adf0bad3b40582925ef7c7f0ed85fceb",
                 "sha256:98c7086708b163d425c67c7a91bad6e466bb99d797aa64f965e9d25c12111a5e",
                 "sha256:9add70b36c5666a2ed02b43b335fe19002ee5235efd4b8a89bfcf9005bebac0d",
                 "sha256:9bf40443012702a1d2070043cb6291650a0841ece432556f784f004937f0f32c",
+                "sha256:a6a744282b7718a2a62d2ed9d993cad6f5f585605ad352c11de459f4108df0a1",
+                "sha256:acf08ac40292838b3cbbb06cfe9b2cb9ec78fce8baca31ddb87aaac2e2dc3bc2",
                 "sha256:ade5e387d2ad0d7ebf59146cc00c8044acbd863725f887353a10df825fc8ae21",
                 "sha256:b00c1de48212e4cc9603895652c5c410df699856a2853135b3967591e4beebc2",
                 "sha256:b1282f8c00509d99fef04d8ba936b156d419be841854fe901d8ae224c59f0be5",
+                "sha256:b1dba4527182c95a0db8b6060cc98ac49b9e2f5e64320e2b56e47cb2831978c7",
                 "sha256:b2051432115498d3562c084a49bba65d97cf251f5a331c64a12ee7e04dacc51b",
+                "sha256:b7d644ddb4dbd407d31ffb699f1d140bc35478da613b441c582aeb7c43838dd8",
                 "sha256:ba59edeaa2fc6114428f1637ffff42da1e311e29382d81b339c1817d37ec93c6",
+                "sha256:bf5aa3cbcfdf57fa2ee9cd1822c862ef23037f5c832ad09cfea57fa846dec193",
                 "sha256:c8716a48d94b06bb3b2524c2b77e055fb313aeb4ea620c8dd03a105574ba704f",
+                "sha256:caabedc8323f1e93231b52fc32bdcde6db817623d33e100708d9a68e1f53b26b",
                 "sha256:cd5df75523866410809ca100dc9681e301e3c27567cf498077e8551b6d20e42f",
                 "sha256:cdb132fc825c38e1aeec2c8aa9338310d29d337bebbd7baa06889d09a60a1fa2",
+                "sha256:d53bc011414228441014aa71dbec320c66468c1030aae3a6e29778a3382d96e5",
+                "sha256:d73a845f227b0bfe8a7455ee623525ee656a9e2e749e4742706d80a6065d5e2c",
+                "sha256:d9be0ba6c527163cbed5e0857c451fcd092ce83947944d6c14bc95441203f032",
                 "sha256:e249096428b3ae81b08327a63a485ad0878de3fb939049038579ac0ef61e17e7",
-                "sha256:e8313f01ba26fbbe36c7be1966a7b7424942f670f38e666995b88d012765b9be"
+                "sha256:e8313f01ba26fbbe36c7be1966a7b7424942f670f38e666995b88d012765b9be",
+                "sha256:feb7b34d6325451ef96bc0e36e1a6c0c1c64bc1fbec4b854f4529e51887b1621"
             ],
             "version": "==1.1.1"
         },
@@ -85,24 +104,24 @@
         },
         "pytz": {
             "hashes": [
-                "sha256:1c557d7d0e871de1f5ccd5833f60fb2550652da6be2693c1e02300743d21500d",
-                "sha256:b02c06db6cf09c12dd25137e563b31700d3b80fcc4ad23abb7a315f2789819be"
+                "sha256:83a4a90894bf38e243cf052c8b58f381bfe9a7a483f6a9cab140bc7f702ac4da",
+                "sha256:eb10ce3e7736052ed3623d49975ce333bcd712c7bb19a58b9e2089d4057d0798"
             ],
-            "version": "==2019.3"
+            "version": "==2021.1"
         },
         "pytzdata": {
             "hashes": [
-                "sha256:84c52b9a47d097fcd483f047a544979de6c3a86e94c845e3569e9f8acd0fa071",
-                "sha256:fac06f7cdfa903188dc4848c655e4adaee67ee0f2fe08e7daf815cf2a761ee5e"
+                "sha256:3efa13b335a00a8de1d345ae41ec78dd11c9f8807f522d39850f2dd828681540",
+                "sha256:e1e14750bcf95016381e4d472bad004eef710f2d6417240904070b3d6654485f"
             ],
-            "version": "==2019.3"
+            "version": "==2020.1"
         },
         "six": {
             "hashes": [
-                "sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a",
-                "sha256:8f3cd2e254d8f793e7f3d6d9df77b92252b52637291d0f0da013c76ea2724b6c"
+                "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259",
+                "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"
             ],
-            "version": "==1.14.0"
+            "version": "==1.15.0"
         },
         "tzlocal": {
             "hashes": [
@@ -114,10 +133,10 @@
     "develop": {
         "attrs": {
             "hashes": [
-                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
-                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
+                "sha256:31b2eced602aa8423c2aea9c76a724617ed67cf9513173fd3a4f03e3a929c7e6",
+                "sha256:832aa3cde19744e49938b91fea06d69ecb9e649c93ba974535d08ad92164f700"
             ],
-            "version": "==19.3.0"
+            "version": "==20.3.0"
         },
         "beautifulsoup4": {
             "hashes": [
@@ -137,17 +156,17 @@
         },
         "more-itertools": {
             "hashes": [
-                "sha256:5dd8bcf33e5f9513ffa06d5ad33d78f31e1931ac9a18f33d37e77a180d393a7c",
-                "sha256:b1ddb932186d8a6ac451e1d95844b382f55e12686d51ca0c68b6f61f2ab7a507"
+                "sha256:5652a9ac72209ed7df8d9c15daf4e1aa0e3d2ccd3c87f8265a0673cd9cbc9ced",
+                "sha256:c5d6da9ca3ff65220c3bfd2a8db06d698f05d4d2b9be57e1deb2be5a45019713"
             ],
-            "version": "==8.2.0"
+            "version": "==8.7.0"
         },
         "packaging": {
             "hashes": [
-                "sha256:3c292b474fda1671ec57d46d739d072bfd495a4f51ad01a055121d81e952b7a3",
-                "sha256:82f77b9bee21c1bafbf35a84905d604d5d1223801d639cf3ed140bd651c08752"
+                "sha256:5b327ac1320dc863dca72f4514ecc086f31186744b84a230374cc1fd776feae5",
+                "sha256:67714da7f7bc052e064859c05c595155bd1ee9f69f76557e21f051443c20947a"
             ],
-            "version": "==20.3"
+            "version": "==20.9"
         },
         "pluggy": {
             "hashes": [
@@ -158,31 +177,31 @@
         },
         "py": {
             "hashes": [
-                "sha256:5e27081401262157467ad6e7f851b7aa402c5852dbcb3dae06768434de5752aa",
-                "sha256:c20fdd83a5dbc0af9efd622bee9a5564e278f6380fffcacc43ba6f43db2813b0"
+                "sha256:21b81bda15b66ef5e1a777a21c4dcd9c20ad3efd0b3f817e7a809035269e1bd3",
+                "sha256:3b80836aa6d1feeaa108e046da6423ab8f6ceda6468545ae8d02d9d58d18818a"
             ],
-            "version": "==1.8.1"
+            "version": "==1.10.0"
         },
         "pycodestyle": {
             "hashes": [
-                "sha256:95a2219d12372f05704562a14ec30bc76b05a5b297b21a5dfe3f6fac3491ae56",
-                "sha256:e40a936c9a450ad81df37f549d676d127b1b66000a6c500caa2b085bc0ca976c"
+                "sha256:514f76d918fcc0b55c6680472f0a37970994e07bbb80725808c17089be302068",
+                "sha256:c389c1d06bf7904078ca03399a4816f974a1d590090fecea0c63ec26ebaf1cef"
             ],
-            "version": "==2.5.0"
+            "version": "==2.7.0"
         },
         "pydocstyle": {
             "hashes": [
-                "sha256:da7831660b7355307b32778c4a0dbfb137d89254ef31a2b2978f50fc0b4d7586",
-                "sha256:f4f5d210610c2d153fae39093d44224c17429e2ad7da12a8b419aba5c2f614b5"
+                "sha256:164befb520d851dbcf0e029681b91f4f599c62c5cd8933fd54b1bfbd50e89e1f",
+                "sha256:d4449cf16d7e6709f63192146706933c7a334af7c0f083904799ccb851c50f6d"
             ],
-            "version": "==5.0.2"
+            "version": "==6.0.0"
         },
         "pyflakes": {
             "hashes": [
-                "sha256:17dbeb2e3f4d772725c777fabc446d5634d1038f234e77343108ce445ea69ce0",
-                "sha256:d976835886f8c5b31d47970ed689944a0262b5f3afa00a5a7b4dc81e5449f8a2"
+                "sha256:910208209dcea632721cb58363d0f72913d9e8cf64dc6f8ae2e02a3609aba40d",
+                "sha256:e59fd8e750e588358f1b8885e5a4751203a0516e0ee6d34811089ac294c8806f"
             ],
-            "version": "==2.1.1"
+            "version": "==2.3.0"
         },
         "pylama": {
             "hashes": [
@@ -194,10 +213,10 @@
         },
         "pyparsing": {
             "hashes": [
-                "sha256:4c830582a84fb022400b85429791bc551f1f4871c33f23e44f353119e92f969f",
-                "sha256:c342dccb5250c08d45fd6f8b4a559613ca603b57498511740e65cd11a2e7dcec"
+                "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1",
+                "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"
             ],
-            "version": "==2.4.6"
+            "version": "==2.4.7"
         },
         "pytest": {
             "hashes": [
@@ -207,33 +226,26 @@
             "index": "pypi",
             "version": "==5.4.1"
         },
-        "six": {
-            "hashes": [
-                "sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a",
-                "sha256:8f3cd2e254d8f793e7f3d6d9df77b92252b52637291d0f0da013c76ea2724b6c"
-            ],
-            "version": "==1.14.0"
-        },
         "snowballstemmer": {
             "hashes": [
-                "sha256:209f257d7533fdb3cb73bdbd24f436239ca3b2fa67d56f6ff88e86be08cc5ef0",
-                "sha256:df3bac3df4c2c01363f3dd2cfa78cce2840a79b9f1c2d2de9ce8d31683992f52"
+                "sha256:b51b447bea85f9968c13b650126a888aabd4cb4463fca868ec596826325dedc2",
+                "sha256:e997baa4f2e9139951b6f4c631bad912dfd3c792467e2f03d7239464af90e914"
             ],
-            "version": "==2.0.0"
+            "version": "==2.1.0"
         },
         "soupsieve": {
             "hashes": [
-                "sha256:e914534802d7ffd233242b785229d5ba0766a7f487385e3f714446a07bf540ae",
-                "sha256:fcd71e08c0aee99aca1b73f45478549ee7e7fc006d51b37bec9e9def7dc22b69"
+                "sha256:052774848f448cf19c7e959adf5566904d525f33a3f8b6ba6f6f8f26ec7de0cc",
+                "sha256:c2c1c2d44f158cdbddab7824a9af8c4f83c76b1e23e049479aa432feb6c4c23b"
             ],
-            "version": "==2.0"
+            "version": "==2.2.1"
         },
         "wcwidth": {
             "hashes": [
-                "sha256:cafe2186b3c009a04067022ce1dcd79cb38d8d65ee4f4791b8888d6599d1bbe1",
-                "sha256:ee73862862a156bf77ff92b09034fc4825dd3af9cf81bc5b360668d425f3c5f1"
+                "sha256:beb4802a9cebb9144e99086eff703a642a13d6a0052920003a230f3294bbe784",
+                "sha256:c4d647b99872929fdb7bdcaa4fbe7f01413ed3d98077df798530e5b04f116c83"
             ],
-            "version": "==0.1.9"
+            "version": "==0.2.5"
         }
     }
 }
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 1d0ba32..8291fce 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,29 +1,17 @@
-################################################################################
-# This requirements file has been automatically generated from `Pipfile` with
-# `pipenv-to-requirements`
-#
-#
-# This has been done to maintain backward compatibility with tools and services
-# that do not support `Pipfile` yet.
-#
-# Do NOT edit it directly, use `pipenv install [-d]` to modify `Pipfile` and
-# `Pipfile.lock` and then regenerate `requirements*.txt`.
-################################################################################
-
-attrs==19.3.0
+-i https://pypi.python.org/simple/
+attrs==20.3.0
 beautifulsoup4==4.8.2
 mccabe==0.6.1
-more-itertools==8.2.0
-packaging==20.3
+more-itertools==8.7.0
+packaging==20.9
 pluggy==0.13.1
-py==1.8.1
-pycodestyle==2.5.0
-pydocstyle==5.0.2
-pyflakes==2.1.1
+py==1.10.0
+pycodestyle==2.7.0
+pydocstyle==6.0.0
+pyflakes==2.3.0
 pylama==7.7.1
-pyparsing==2.4.6
+pyparsing==2.4.7
 pytest==5.4.1
-six==1.14.0
-snowballstemmer==2.0.0
-soupsieve==2.0
-wcwidth==0.1.9
+snowballstemmer==2.1.0
+soupsieve==2.2.1
+wcwidth==0.2.5
diff --git a/requirements.txt b/requirements.txt
index ec96ada..e0d47d4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,20 +1,9 @@
-################################################################################
-# This requirements file has been automatically generated from `Pipfile` with
-# `pipenv-to-requirements`
-#
-#
-# This has been done to maintain backward compatibility with tools and services
-# that do not support `Pipfile` yet.
-#
-# Do NOT edit it directly, use `pipenv install [-d]` to modify `Pipfile` and
-# `Pipfile.lock` and then regenerate `requirements*.txt`.
-################################################################################
-
-jinja2==2.11.1
+-i https://pypi.python.org/simple/
+jinja2==2.11.3
 markupsafe==1.1.1
 pendulum==1.5.1
 python-dateutil==2.8.1
-pytz==2019.3
-pytzdata==2019.3
-six==1.14.0
+pytz==2021.1
+pytzdata==2020.1
+six==1.15.0
 tzlocal==1.5.1