diff --git a/poetry.lock b/poetry.lock
index d1791a1..3464d05 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -108,8 +108,8 @@ category = "dev"
 description = "Cross-platform colored terminal text."
 name = "colorama"
 optional = false
-python-versions = "*"
-version = "0.3.9"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "0.4.3"
 
 [[package]]
 category = "dev"
@@ -474,6 +474,14 @@ version = "0.2.3"
 [package.dependencies]
 flake8 = "*"
 
+[[package]]
+category = "dev"
+description = "Clean single-source support for Python 3 and 2"
+name = "future"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+version = "0.18.2"
+
 [[package]]
 category = "dev"
 description = "Git Object Database"
@@ -851,11 +859,12 @@ description = "Code Metrics in Python"
 name = "radon"
 optional = false
 python-versions = "*"
-version = "2.4.0"
+version = "4.0.0"
 
 [package.dependencies]
-colorama = ">=0.3,<0.4"
+colorama = ">=0.4,<0.5"
 flake8-polyfill = "*"
+future = "*"
 mando = ">=0.6,<0.7"
 
 [[package]]
@@ -1132,7 +1141,7 @@ description = "The strictest and most opinionated python linter ever"
 name = "wemake-python-styleguide"
 optional = false
 python-versions = ">=3.6,<4.0"
-version = "0.13.2"
+version = "0.13.3"
 
 [package.dependencies]
 astor = ">=0.8,<0.9"
@@ -1161,7 +1170,7 @@ flake8-rst-docstrings = ">=0.0.12,<0.0.13"
 flake8-string-format = ">=0.2,<0.3"
 pep8-naming = ">=0.9.1,<0.10.0"
 pygments = ">=2.4,<3.0"
-radon = ">=2.4,<3.0"
+radon = ">=4.0,<5.0"
 typing_extensions = ">=3.6,<4.0"
 
 [[package]]
@@ -1177,7 +1186,7 @@ version = "0.6.0"
 more-itertools = "*"
 
 [metadata]
-content-hash = "e60ba8d698ffc602b0a8ac6d0d3f804ef24ad47fff3b032b949b5d628a3ef7d0"
+content-hash = "e192099179e424a41eae224710e3e53ea05c47d3dfb6bbc6574e0fbe951fa210"
 python-versions = "^3.6 || ^3.7"
 
 [metadata.hashes]
@@ -1192,7 +1201,7 @@ chardet = ["84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae", "
 click = ["29f99fc6125fbc931b758dc053b3114e55c77a6e4c6c3a2674a2dc986016381d", "f15516df478d5a56180fbf80e68f206010e6d160fc39fa508b65e035fd75130b"]
 click-default-group = ["d9560e8e8dfa44b3562fbc9425042a0fd6d21956fcc2db0077f63f34253ab904"]
 cognitive-complexity = ["8a456bf2871a40c73f33c937ec0b42bc2daaefafa850b3158b0f7a2a91af2b64"]
-colorama = ["463f8483208e921368c9f306094eb6f725c6ca42b0f97e313cb5d5512459feda", "48eb22f4f8461b1df5734a074b57042430fb06e1d61bd1e11b078c0fe6d7a1f1"]
+colorama = ["7d73d2a99753107a36ac6b455ee49046802e59d9d076ef8e47b61499fa29afff", "e96da0d330793e2cb9485e9ddfd918d456036c7149416295932478192f4436a1"]
 coverage = ["08907593569fe59baca0bf152c43f3863201efb6113ecb38ce7e97ce339805a6", "0be0f1ed45fc0c185cfd4ecc19a1d6532d72f86a2bac9de7e24541febad72650", "141f08ed3c4b1847015e2cd62ec06d35e67a3ac185c26f7635f4406b90afa9c5", "19e4df788a0581238e9390c85a7a09af39c7b539b29f25c89209e6c3e371270d", "23cc09ed395b03424d1ae30dcc292615c1372bfba7141eb85e11e50efaa6b351", "245388cda02af78276b479f299bbf3783ef0a6a6273037d7c60dc73b8d8d7755", "331cb5115673a20fb131dadd22f5bcaf7677ef758741312bee4937d71a14b2ef", "386e2e4090f0bc5df274e720105c342263423e77ee8826002dcffe0c9533dbca", "3a794ce50daee01c74a494919d5ebdc23d58873747fa0e288318728533a3e1ca", "60851187677b24c6085248f0a0b9b98d49cba7ecc7ec60ba6b9d2e5574ac1ee9", "63a9a5fc43b58735f65ed63d2cf43508f462dc49857da70b8980ad78d41d52fc", "6b62544bb68106e3f00b21c8930e83e584fdca005d4fffd29bb39fb3ffa03cb5", "6ba744056423ef8d450cf627289166da65903885272055fb4b5e113137cfa14f", "7494b0b0274c5072bddbfd5b4a6c6f18fbbe1ab1d22a41e99cd2d00c8f96ecfe", "826f32b9547c8091679ff292a82aca9c7b9650f9fda3e2ca6bf2ac905b7ce888", "93715dffbcd0678057f947f496484e906bf9509f5c1c38fc9ba3922893cda5f5", "9a334d6c83dfeadae576b4d633a71620d40d1c379129d587faa42ee3e2a85cce", "af7ed8a8aa6957aac47b4268631fa1df984643f07ef00acd374e456364b373f5", "bf0a7aed7f5521c7ca67febd57db473af4762b9622254291fbcbb8cd0ba5e33e", "bf1ef9eb901113a9805287e090452c05547578eaab1b62e4ad456fcc049a9b7e", "c0afd27bc0e307a1ffc04ca5ec010a290e49e3afbe841c5cafc5c5a80ecd81c9", "dd579709a87092c6dbee09d1b7cfa81831040705ffa12a1b248935274aee0437", "df6712284b2e44a065097846488f66840445eb987eb81b3cc6e4149e7b6982e1", "e07d9f1a23e9e93ab5c62902833bf3e4b1f65502927379148b6622686223125c", "e2ede7c1d45e65e209d6093b762e98e8318ddeff95317d07a27a2140b80cfd24", "e4ef9c164eb55123c62411f5936b5c2e521b12356037b6e1c2617cef45523d47", "eca2b7343524e7ba246cab8ff00cab47a2d6d54ada3b02772e908a45675722e2", "eee64c616adeff7db37cc37da4180a3a5b6177f5c46b187894e633f088fb5b28", "ef824cad1f980d27f26166f86856efe11eff9912c4fed97d3804820d43fa550c", "efc89291bd5a08855829a3c522df16d856455297cf35ae827a37edac45f466a7", "fa964bae817babece5aa2e8c1af841bebb6d0b9add8e637548809d040443fee0", "ff37757e068ae606659c28c3bd0d923f9d29a85de79bf25b2b34b148473b5025"]
 darglint = ["2fe546c4b5d60f523dae4e9f975542c5b1b42838b22e8be64254684e361b0a5f", "8511f7e403e4512e6901d067b2a82b66c09f9497651b728023eeb4564bf8c0c1"]
 dataclasses = ["454a69d788c7fda44efd71e259be79577822f5e3f53f029a22d08004e951dc9f", "6988bd2b895eef432d562370bb707d540f32f7360ab13da45340101bc2307d84"]
@@ -1226,6 +1235,7 @@ flake8-pytest-style = ["1c2303998c509cd65c3fb047cd536787ddf953e8113bc7f086c0cd74
 flake8-quotes = ["11a15d30c92ca5f04c2791bd7019cf62b6f9d3053eb050d02a135557eb118bfc"]
 flake8-rst-docstrings = ["01d38327801781b26c3dfeb71ae37e5a02c5ca1b774a686f63feab8824ca6f9c"]
 flake8-string-format = ["68ea72a1a5b75e7018cae44d14f32473c798cf73d75cbaed86c6a9a907b770b2", "774d56103d9242ed968897455ef49b7d6de272000cfa83de5814273a868832f1"]
+future = ["b1bead90b70cf6ec3f0710ae53a525360fa360d306a86583adc6bf83a4db537d"]
 gitdb2 = ["1b6df1433567a51a4a9c1a5a0de977aa351a405cc56d7d35f3388bad1f630350", "96bbb507d765a7f51eb802554a9cfe194a174582f772e0d89f4e87288c288b7b"]
 gitpython = ["9c2398ffc3dcb3c40b27324b316f08a4f93ad646d5a6328cafbb871aa79f5e42", "c155c6a2653593ccb300462f6ef533583a913e17857cfef8fc617c246b6dc245"]
 idna = ["c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407", "ea8b7f6188e6fa117537c3df7da9fc686d485087abf6ac197f9c46432f7e4a3c"]
@@ -1262,7 +1272,7 @@ pytest-randomly = ["5facc2b5ac56e36b9c4bf14f49cc7b4c95427835bbf4a3c739b71a5f5f82
 python-slugify = ["a8fc3433821140e8f409a9831d13ae5deccd0b033d4744d94b31fea141bdd84c"]
 pytz = ["1c557d7d0e871de1f5ccd5833f60fb2550652da6be2693c1e02300743d21500d", "b02c06db6cf09c12dd25137e563b31700d3b80fcc4ad23abb7a315f2789819be"]
 pyyaml = ["0113bc0ec2ad727182326b61326afa3d1d8280ae1122493553fd6f4397f33df9", "01adf0b6c6f61bd11af6e10ca52b7d4057dd0be0343eb9283c878cf3af56aee4", "5124373960b0b3f4aa7df1707e63e9f109b5263eca5976c66e08b1c552d4eaf8", "5ca4f10adbddae56d824b2c09668e91219bb178a1eee1faa56af6f99f11bf696", "7907be34ffa3c5a32b60b95f4d95ea25361c951383a894fec31be7252b2b6f34", "7ec9b2a4ed5cad025c2278a1e6a19c011c80a3caaac804fd2d329e9cc2c287c9", "87ae4c829bb25b9fe99cf71fbb2140c448f534e24c998cc60f39ae4f94396a73", "9de9919becc9cc2ff03637872a440195ac4241c80536632fffeb6a1e25a74299", "a5a85b10e450c66b49f98846937e8cfca1db3127a9d5d1e31ca45c3d0bef4c5b", "b0997827b4f6a7c286c01c5f60384d218dca4ed7d9efa945c3e1aa623d5709ae", "b631ef96d3222e62861443cc89d6563ba3eeb816eeb96b2629345ab795e53681", "bf47c0607522fdbca6c9e817a6e81b08491de50f3766a7a0e6a5be7905961b41", "f81025eddd0327c7d4cfe9b62cf33190e1e736cc6e97502b3ec425f574b3e7a8"]
-radon = ["38e495a4aa4c1d7293d3c1733393961fb52209c9bc2d75163c3ba8124d8bbbaa", "f893f2faa632a060f6d0f01843d10a0395515bde865c759c0dd3f15239caf11b"]
+radon = ["20f799949e42e6899bc9304539de222d3bdaeec276f38fbd4034859ccd548b46", "32ac2f86bfacbddade5c79f0e927e97f90a5cda5b86f880511dd849c4a0096e3"]
 requests = ["11e007a8a2aa0323f5a921e9e6a2d7e4e67d9877e85773fba9ba6419025cbeb4", "9cf5292fcd0f598c671cfc1e0d7d1a7f13bb8085e9a590f48c010551dc6c4b31"]
 restructuredtext-lint = ["97b3da356d5b3a8514d8f1f9098febd8b41463bed6a1d9f126cf0a048b6fd908"]
 "ruamel.yaml" = ["0db639b1b2742dae666c6fc009b8d1931ef15c9276ef31c0673cc6dcf766cf40", "412a6f5cfdc0525dee6a27c08f5415c7fd832a7afcb7a0ed7319628aed23d408"]
@@ -1290,5 +1300,5 @@ typed-ast = ["1170afa46a3799e18b4c977777ce137bb53c7485379d9706af8a59f2ea1aa161",
 typing-extensions = ["091ecc894d5e908ac75209f10d5b4f118fbdb2eb1ede6a63544054bb1edb41f2", "910f4656f54de5993ad9304959ce9bb903f90aadc7c67a0bef07e678014e892d", "cf8b63fedea4d89bab840ecbb93e75578af28f76f66c35889bd7065f5af88575"]
 urllib3 = ["a8a318824cc77d1fd4b2bec2ded92646630d7fe8619497b142c84a9e6f5a7293", "f3c5fd51747d450d4dcf6f923c81f78f811aab8205fda64b0aba34a4e48b0745"]
 wcwidth = ["3df37372226d6e63e1b1e1eda15c594bca98a22d33a23832a90998faa96bc65e", "f4ebe71925af7b40a864553f761ed559b43544f8f71746c2d756c7fe788ade7c"]
-wemake-python-styleguide = ["068af99d31010f991d792ba5acfa848b18f5345423795c14e9edb440c0be8c06", "5e7e3b1c38f8aa5b9814a13b99cbd77c7ced4089f5378889ee8e345a39e3da3d"]
+wemake-python-styleguide = ["4705b9f963053628ed6800a922622f9b0491a9e23986707b612f033009e48c7c", "dc7bff88777e9183c636e07da6b99ee36383a8c10e3968be82f61f25f1627e0c"]
 zipp = ["3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e", "f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335"]
diff --git a/pyproject.toml b/pyproject.toml
index 9863cc8..25aacb7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ dataclasses = { version = "^0.6", python = "<3.7" }
 typing_extensions = "^3.6"
 
 [tool.poetry.dev-dependencies]
-wemake-python-styleguide = "^0.13.2"
+wemake-python-styleguide = "^0.13.3"
 flake8-pytest = "^1.3"
 flake8-pytest-style = "^0.1.3"
 nitpick = "^0.21.3"