diff --git a/poetry.lock b/poetry.lock
index f95d7884..1bc05c34 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -160,8 +160,8 @@ category = "dev"
 description = "Composable command line interface toolkit"
 name = "click"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "7.0"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "7.1.1"
 
 [[package]]
 category = "dev"
@@ -189,7 +189,7 @@ description = "Decorators for Humans"
 name = "decorator"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*"
-version = "4.4.1"
+version = "4.4.2"
 
 [[package]]
 category = "dev"
@@ -226,6 +226,14 @@ flake8 = ">=3.3.0"
 jinja2 = ">=2.9.0"
 pygments = ">=2.2.0"
 
+[[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 = "main"
 description = "A pure-Python, bring-your-own-I/O implementation of HTTP/1.1"
@@ -319,7 +327,7 @@ description = "IPython: Productive Interactive Computing"
 name = "ipython"
 optional = false
 python-versions = ">=3.6"
-version = "7.12.0"
+version = "7.13.0"
 
 [package.dependencies]
 appnope = "*"
@@ -335,7 +343,7 @@ setuptools = ">=18.5"
 traitlets = ">=4.2"
 
 [package.extras]
-all = ["ipyparallel", "requests", "notebook", "qtconsole", "ipywidgets", "pygments", "nbconvert", "testpath", "Sphinx (>=1.3)", "nbformat", "numpy (>=1.14)", "ipykernel", "nose (>=0.10.1)"]
+all = ["numpy (>=1.14)", "testpath", "notebook", "nose (>=0.10.1)", "nbconvert", "requests", "ipywidgets", "qtconsole", "ipyparallel", "Sphinx (>=1.3)", "pygments", "nbformat", "ipykernel"]
 doc = ["Sphinx (>=1.3)"]
 kernel = ["ipykernel"]
 nbconvert = ["nbconvert"]
@@ -408,6 +416,25 @@ version = "2.6.1"
 six = "*"
 tornado = "*"
 
+[[package]]
+category = "dev"
+description = "A Python implementation of Lunr.js"
+name = "lunr"
+optional = false
+python-versions = "*"
+version = "0.5.6"
+
+[package.dependencies]
+future = ">=0.16.0"
+six = ">=1.11.0"
+
+[package.dependencies.nltk]
+optional = true
+version = ">=3.2.5"
+
+[package.extras]
+languages = ["nltk (>=3.2.5)"]
+
 [[package]]
 category = "dev"
 description = "Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API."
@@ -476,17 +503,21 @@ category = "dev"
 description = "Project documentation with Markdown."
 name = "mkdocs"
 optional = false
-python-versions = ">=2.7.9,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
-version = "1.0.4"
+python-versions = ">=3.5"
+version = "1.1"
 
 [package.dependencies]
-Jinja2 = ">=2.7.1"
-Markdown = ">=2.3.1"
+Jinja2 = ">=2.10.1"
+Markdown = ">=3.2.1"
 PyYAML = ">=3.10"
 click = ">=3.3"
 livereload = ">=2.5.1"
 tornado = ">=5.0"
 
+[package.dependencies.lunr]
+extras = ["languages"]
+version = "0.5.6"
+
 [[package]]
 category = "dev"
 description = "A Material Design theme for MkDocs"
@@ -541,13 +572,32 @@ optional = false
 python-versions = "*"
 version = "0.4.3"
 
+[[package]]
+category = "dev"
+description = "Natural Language Toolkit"
+name = "nltk"
+optional = false
+python-versions = "*"
+version = "3.4.5"
+
+[package.dependencies]
+six = "*"
+
+[package.extras]
+all = ["pyparsing", "scikit-learn", "python-crfsuite", "matplotlib", "scipy", "gensim", "requests", "twython", "numpy"]
+corenlp = ["requests"]
+machine_learning = ["gensim", "numpy", "python-crfsuite", "scikit-learn", "scipy"]
+plot = ["matplotlib"]
+tgrep = ["pyparsing"]
+twitter = ["twython"]
+
 [[package]]
 category = "dev"
 description = "Core utilities for Python packages"
 name = "packaging"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "20.1"
+version = "20.3"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
@@ -559,7 +609,7 @@ description = "A Python Parser"
 name = "parso"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.6.1"
+version = "0.6.2"
 
 [package.extras]
 testing = ["docopt", "pytest (>=3.0.7)"]
@@ -613,8 +663,8 @@ category = "dev"
 description = "Library for building powerful interactive command lines in Python"
 name = "prompt-toolkit"
 optional = false
-python-versions = ">=3.6"
-version = "3.0.3"
+python-versions = ">=3.6.1"
+version = "3.0.4"
 
 [package.dependencies]
 wcwidth = "*"
@@ -670,8 +720,8 @@ category = "dev"
 description = "Pygments is a syntax highlighting package written in Python."
 name = "pygments"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.5.2"
+python-versions = ">=3.5"
+version = "2.6.1"
 
 [[package]]
 category = "dev"
@@ -753,7 +803,7 @@ description = "pytest plugin for generating HTML reports"
 name = "pytest-html"
 optional = false
 python-versions = ">=3.6"
-version = "2.0.1"
+version = "2.1.0"
 
 [package.dependencies]
 pytest = ">=5.0"
@@ -882,7 +932,7 @@ description = "Tornado is a Python web framework and asynchronous networking lib
 name = "tornado"
 optional = false
 python-versions = ">= 3.5"
-version = "6.0.3"
+version = "6.0.4"
 
 [[package]]
 category = "dev"
@@ -965,7 +1015,7 @@ marker = "python_version >= \"3.5\" and python_version < \"3.8\" or python_versi
 name = "zipp"
 optional = false
 python-versions = ">=3.6"
-version = "3.0.0"
+version = "3.1.0"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
@@ -975,7 +1025,7 @@ testing = ["jaraco.itertools", "func-timeout"]
 fast = ["uvloop"]
 
 [metadata]
-content-hash = "d71d0606da0aeda76ffb026cc7bab6445522cef5e5b60207005e3447d6297684"
+content-hash = "73b45cffbbc348a1fae4d9c90e87968575cec3037bb82092a43f5ff2a69e73d4"
 python-versions = "^3.7"
 
 [metadata.files]
@@ -1049,8 +1099,8 @@ chardet = [
     {file = "chardet-3.0.4.tar.gz", hash = "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae"},
 ]
 click = [
-    {file = "Click-7.0-py2.py3-none-any.whl", hash = "sha256:2335065e6395b9e67ca716de5f7526736bfa6ceead690adf616d925bdc622b13"},
-    {file = "Click-7.0.tar.gz", hash = "sha256:5b94b49521f6456670fdb30cd82a4eca9412788a93fa6dd6df72c94d5a8ff2d7"},
+    {file = "click-7.1.1-py2.py3-none-any.whl", hash = "sha256:e345d143d80bf5ee7534056164e5e112ea5e22716bbb1ce727941f4c8b471b9a"},
+    {file = "click-7.1.1.tar.gz", hash = "sha256:8a18b4ea89d8820c5d0c7da8a64b2c324b4dabb695804dbfea19b9be9d88c0cc"},
 ]
 colorama = [
     {file = "colorama-0.4.3-py2.py3-none-any.whl", hash = "sha256:7d73d2a99753107a36ac6b455ee49046802e59d9d076ef8e47b61499fa29afff"},
@@ -1090,8 +1140,8 @@ coverage = [
     {file = "coverage-5.0.3.tar.gz", hash = "sha256:77afca04240c40450c331fa796b3eab6f1e15c5ecf8bf2b8bee9706cd5452fef"},
 ]
 decorator = [
-    {file = "decorator-4.4.1-py2.py3-none-any.whl", hash = "sha256:5d19b92a3c8f7f101c8dd86afd86b0f061a8ce4540ab8cd401fa2542756bce6d"},
-    {file = "decorator-4.4.1.tar.gz", hash = "sha256:54c38050039232e1db4ad7375cfce6748d7b41c29e95a081c8a6d2c30364a2ce"},
+    {file = "decorator-4.4.2-py2.py3-none-any.whl", hash = "sha256:41fa54c2a0cc4ba648be4fd43cff00aedf5b9465c9bf18d64325bc225f08f760"},
+    {file = "decorator-4.4.2.tar.gz", hash = "sha256:e3a62f0520172440ca0dcc823749319382e377f37f140a0b99ef45fecb84bfe7"},
 ]
 entrypoints = [
     {file = "entrypoints-0.3-py2.py3-none-any.whl", hash = "sha256:589f874b313739ad35be6e0cd7efde2a4e9b6fea91edcc34e58ecbb8dbe56d19"},
@@ -1105,6 +1155,9 @@ flake8-html = [
     {file = "flake8-html-0.4.0.tar.gz", hash = "sha256:44bec37f142e97c4a5b2cf10efe24ed253617a9736878851a594d4763011e742"},
     {file = "flake8_html-0.4.0-py2.py3-none-any.whl", hash = "sha256:f372cd599ba9a374943eaa75a9cce30408cf4c0cc2251bc5194e6b0d3fc2bc3a"},
 ]
+future = [
+    {file = "future-0.18.2.tar.gz", hash = "sha256:b1bead90b70cf6ec3f0710ae53a525360fa360d306a86583adc6bf83a4db537d"},
+]
 h11 = [
     {file = "h11-0.9.0-py2.py3-none-any.whl", hash = "sha256:4bc6d6a1238b7615b266ada57e0618568066f57dd6fa967d1290ec9309b2f2f1"},
     {file = "h11-0.9.0.tar.gz", hash = "sha256:33d4bca7be0fa039f4e84d50ab00531047e53d6ee8ffbc83501ea602c169cae1"},
@@ -1137,8 +1190,8 @@ importlib-metadata = [
     {file = "importlib_metadata-1.5.0.tar.gz", hash = "sha256:06f5b3a99029c7134207dd882428a66992a9de2bef7c2b699b5641f9886c3302"},
 ]
 ipython = [
-    {file = "ipython-7.12.0-py3-none-any.whl", hash = "sha256:f6689108b1734501d3b59c84427259fd5ac5141afe2e846cfa8598eb811886c9"},
-    {file = "ipython-7.12.0.tar.gz", hash = "sha256:d9459e7237e2e5858738ff9c3e26504b79899b58a6d49e574d352493d80684c6"},
+    {file = "ipython-7.13.0-py3-none-any.whl", hash = "sha256:eb8d075de37f678424527b5ef6ea23f7b80240ca031c2dd6de5879d687a65333"},
+    {file = "ipython-7.13.0.tar.gz", hash = "sha256:ca478e52ae1f88da0102360e57e528b92f3ae4316aabac80a2cd7f7ab2efb48a"},
 ]
 ipython-genutils = [
     {file = "ipython_genutils-0.2.0-py2.py3-none-any.whl", hash = "sha256:72dd37233799e619666c9f639a9da83c34013a73e8bbc79a7a6348d93c61fab8"},
@@ -1160,6 +1213,10 @@ livereload = [
     {file = "livereload-2.6.1-py2.py3-none-any.whl", hash = "sha256:78d55f2c268a8823ba499305dcac64e28ddeb9a92571e12d543cd304faf5817b"},
     {file = "livereload-2.6.1.tar.gz", hash = "sha256:89254f78d7529d7ea0a3417d224c34287ebfe266b05e67e51facaf82c27f0f66"},
 ]
+lunr = [
+    {file = "lunr-0.5.6-py2.py3-none-any.whl", hash = "sha256:1208622930c915a07e6f8e8640474357826bad48534c0f57969b6fca9bffc88e"},
+    {file = "lunr-0.5.6.tar.gz", hash = "sha256:7be69d7186f65784a4f2adf81e5c58efd6a9921aa95966babcb1f2f2ada75c20"},
+]
 lxml = [
     {file = "lxml-4.5.0-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:0701f7965903a1c3f6f09328c1278ac0eee8f56f244e66af79cb224b7ef3801c"},
     {file = "lxml-4.5.0-cp27-cp27m-manylinux1_i686.whl", hash = "sha256:06d4e0bbb1d62e38ae6118406d7cdb4693a3fa34ee3762238bcb96c9e36a93cd"},
@@ -1239,8 +1296,8 @@ mkautodoc = [
     {file = "mkautodoc-0.1.0.tar.gz", hash = "sha256:7c2595f40276b356e576ce7e343338f8b4fa1e02ea904edf33fadf82b68ca67c"},
 ]
 mkdocs = [
-    {file = "mkdocs-1.0.4-py2.py3-none-any.whl", hash = "sha256:8cc8b38325456b9e942c981a209eaeb1e9f3f77b493ad755bfef889b9c8d356a"},
-    {file = "mkdocs-1.0.4.tar.gz", hash = "sha256:17d34329aad75d5de604b9ed4e31df3a4d235afefdc46ce7b1964fddb2e1e939"},
+    {file = "mkdocs-1.1-py2.py3-none-any.whl", hash = "sha256:1e385a70aea8a9dedb731aea4fd5f3704b2074801c4f96f06b2920999babda8a"},
+    {file = "mkdocs-1.1.tar.gz", hash = "sha256:9243291392f59e20b655e4e46210233453faf97787c2cf72176510e868143174"},
 ]
 mkdocs-material = [
     {file = "mkdocs-material-4.6.3.tar.gz", hash = "sha256:1d486635b03f5a2ec87325842f7b10c7ae7daa0eef76b185572eece6a6ea212c"},
@@ -1289,13 +1346,17 @@ mypy-extensions = [
     {file = "mypy_extensions-0.4.3-py2.py3-none-any.whl", hash = "sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d"},
     {file = "mypy_extensions-0.4.3.tar.gz", hash = "sha256:2d82818f5bb3e369420cb3c4060a7970edba416647068eb4c5343488a6c604a8"},
 ]
+nltk = [
+    {file = "nltk-3.4.5.win32.exe", hash = "sha256:a08bdb4b8a1c13de16743068d9eb61c8c71c2e5d642e8e08205c528035843f82"},
+    {file = "nltk-3.4.5.zip", hash = "sha256:bed45551259aa2101381bbdd5df37d44ca2669c5c3dad72439fa459b29137d94"},
+]
 packaging = [
-    {file = "packaging-20.1-py2.py3-none-any.whl", hash = "sha256:170748228214b70b672c581a3dd610ee51f733018650740e98c7df862a583f73"},
-    {file = "packaging-20.1.tar.gz", hash = "sha256:e665345f9eef0c621aa0bf2f8d78cf6d21904eef16a93f020240b704a57f1334"},
+    {file = "packaging-20.3-py2.py3-none-any.whl", hash = "sha256:82f77b9bee21c1bafbf35a84905d604d5d1223801d639cf3ed140bd651c08752"},
+    {file = "packaging-20.3.tar.gz", hash = "sha256:3c292b474fda1671ec57d46d739d072bfd495a4f51ad01a055121d81e952b7a3"},
 ]
 parso = [
-    {file = "parso-0.6.1-py2.py3-none-any.whl", hash = "sha256:951af01f61e6dccd04159042a0706a31ad437864ec6e25d0d7a96a9fbb9b0095"},
-    {file = "parso-0.6.1.tar.gz", hash = "sha256:56b2105a80e9c4df49de85e125feb6be69f49920e121406f15e7acde6c9dfc57"},
+    {file = "parso-0.6.2-py2.py3-none-any.whl", hash = "sha256:8515fc12cfca6ee3aa59138741fc5624d62340c97e401c74875769948d4f2995"},
+    {file = "parso-0.6.2.tar.gz", hash = "sha256:0c5659e0c6eba20636f99a04f469798dca8da279645ce5c387315b2c23912157"},
 ]
 pathspec = [
     {file = "pathspec-0.7.0-py2.py3-none-any.whl", hash = "sha256:163b0632d4e31cef212976cf57b43d9fd6b0bac6e67c26015d611a647d5e7424"},
@@ -1314,8 +1375,8 @@ pluggy = [
     {file = "pluggy-0.13.1.tar.gz", hash = "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0"},
 ]
 prompt-toolkit = [
-    {file = "prompt_toolkit-3.0.3-py3-none-any.whl", hash = "sha256:c93e53af97f630f12f5f62a3274e79527936ed466f038953dfa379d4941f651a"},
-    {file = "prompt_toolkit-3.0.3.tar.gz", hash = "sha256:a402e9bf468b63314e37460b68ba68243d55b2f8c4d0192f85a019af3945050e"},
+    {file = "prompt_toolkit-3.0.4-py3-none-any.whl", hash = "sha256:859e1b205b6cf6a51fa57fa34202e45365cf58f8338f0ee9f4e84a4165b37d5b"},
+    {file = "prompt_toolkit-3.0.4.tar.gz", hash = "sha256:ebe6b1b08c888b84c50d7f93dee21a09af39860144ff6130aadbd61ae8d29783"},
 ]
 ptyprocess = [
     {file = "ptyprocess-0.6.0-py2.py3-none-any.whl", hash = "sha256:d7cc528d76e76342423ca640335bd3633420dc1366f258cb31d05e865ef5ca1f"},
@@ -1350,8 +1411,8 @@ pyflakes = [
     {file = "pyflakes-2.1.1.tar.gz", hash = "sha256:d976835886f8c5b31d47970ed689944a0262b5f3afa00a5a7b4dc81e5449f8a2"},
 ]
 pygments = [
-    {file = "Pygments-2.5.2-py2.py3-none-any.whl", hash = "sha256:2a3fe295e54a20164a9df49c75fa58526d3be48e14aceba6d6b1e8ac0bfd6f1b"},
-    {file = "Pygments-2.5.2.tar.gz", hash = "sha256:98c8aa5a9f778fcd1026a17361ddaf7330d1b7c62ae97c3bb0ae73e0b9b6b0fe"},
+    {file = "Pygments-2.6.1-py3-none-any.whl", hash = "sha256:ff7a40b4860b727ab48fad6360eb351cc1b33cbf9b15a0f689ca5353e9463324"},
+    {file = "Pygments-2.6.1.tar.gz", hash = "sha256:647344a061c249a3b74e230c739f434d7ea4d8b1d5f3721bc0f3558049b38f44"},
 ]
 pymdown-extensions = [
     {file = "pymdown-extensions-6.3.tar.gz", hash = "sha256:cb879686a586b22292899771f5e5bc3382808e92aa938f71b550ecdea709419f"},
@@ -1374,8 +1435,8 @@ pytest-cov = [
     {file = "pytest_cov-2.8.1-py2.py3-none-any.whl", hash = "sha256:cdbdef4f870408ebdbfeb44e63e07eb18bb4619fae852f6e760645fa36172626"},
 ]
 pytest-html = [
-    {file = "pytest-html-2.0.1.tar.gz", hash = "sha256:933da7a5e71e5eace9e475441ed88a684f20f6198aa36516cb947ac05edd9921"},
-    {file = "pytest_html-2.0.1-py2.py3-none-any.whl", hash = "sha256:bc40553ca2a1835479c2caf7d48604502cd66d0c5db58ddbca53d74946ee71bd"},
+    {file = "pytest-html-2.1.0.tar.gz", hash = "sha256:8645a8616c8ed7414678e0aeebc3b2fd7d44268773ef5e7289289ad8632c9e91"},
+    {file = "pytest_html-2.1.0-py2.py3-none-any.whl", hash = "sha256:0317a0a589db59c26091ab6068b3edac8d9bc1a8bb9727ade48f806797346956"},
 ]
 pytest-metadata = [
     {file = "pytest-metadata-1.8.0.tar.gz", hash = "sha256:2071a59285de40d7541fde1eb9f1ddea1c9db165882df82781367471238b66ba"},
@@ -1451,13 +1512,15 @@ toml = [
     {file = "toml-0.10.0.tar.gz", hash = "sha256:229f81c57791a41d65e399fc06bf0848bab550a9dfd5ed66df18ce5f05e73d5c"},
 ]
 tornado = [
-    {file = "tornado-6.0.3-cp35-cp35m-win32.whl", hash = "sha256:c9399267c926a4e7c418baa5cbe91c7d1cf362d505a1ef898fde44a07c9dd8a5"},
-    {file = "tornado-6.0.3-cp35-cp35m-win_amd64.whl", hash = "sha256:398e0d35e086ba38a0427c3b37f4337327231942e731edaa6e9fd1865bbd6f60"},
-    {file = "tornado-6.0.3-cp36-cp36m-win32.whl", hash = "sha256:4e73ef678b1a859f0cb29e1d895526a20ea64b5ffd510a2307b5998c7df24281"},
-    {file = "tornado-6.0.3-cp36-cp36m-win_amd64.whl", hash = "sha256:349884248c36801afa19e342a77cc4458caca694b0eda633f5878e458a44cb2c"},
-    {file = "tornado-6.0.3-cp37-cp37m-win32.whl", hash = "sha256:559bce3d31484b665259f50cd94c5c28b961b09315ccd838f284687245f416e5"},
-    {file = "tornado-6.0.3-cp37-cp37m-win_amd64.whl", hash = "sha256:abbe53a39734ef4aba061fca54e30c6b4639d3e1f59653f0da37a0003de148c7"},
-    {file = "tornado-6.0.3.tar.gz", hash = "sha256:c845db36ba616912074c5b1ee897f8e0124df269468f25e4fe21fe72f6edd7a9"},
+    {file = "tornado-6.0.4-cp35-cp35m-win32.whl", hash = "sha256:5217e601700f24e966ddab689f90b7ea4bd91ff3357c3600fa1045e26d68e55d"},
+    {file = "tornado-6.0.4-cp35-cp35m-win_amd64.whl", hash = "sha256:c98232a3ac391f5faea6821b53db8db461157baa788f5d6222a193e9456e1740"},
+    {file = "tornado-6.0.4-cp36-cp36m-win32.whl", hash = "sha256:5f6a07e62e799be5d2330e68d808c8ac41d4a259b9cea61da4101b83cb5dc673"},
+    {file = "tornado-6.0.4-cp36-cp36m-win_amd64.whl", hash = "sha256:c952975c8ba74f546ae6de2e226ab3cc3cc11ae47baf607459a6728585bb542a"},
+    {file = "tornado-6.0.4-cp37-cp37m-win32.whl", hash = "sha256:2c027eb2a393d964b22b5c154d1a23a5f8727db6fda837118a776b29e2b8ebc6"},
+    {file = "tornado-6.0.4-cp37-cp37m-win_amd64.whl", hash = "sha256:5618f72e947533832cbc3dec54e1dffc1747a5cb17d1fd91577ed14fa0dc081b"},
+    {file = "tornado-6.0.4-cp38-cp38-win32.whl", hash = "sha256:22aed82c2ea340c3771e3babc5ef220272f6fd06b5108a53b4976d0d722bcd52"},
+    {file = "tornado-6.0.4-cp38-cp38-win_amd64.whl", hash = "sha256:c58d56003daf1b616336781b26d184023ea4af13ae143d9dda65e31e534940b9"},
+    {file = "tornado-6.0.4.tar.gz", hash = "sha256:0fe2d45ba43b00a41cd73f8be321a44936dc1aba233dee979f17a042b83eb6dc"},
 ]
 traitlets = [
     {file = "traitlets-4.3.3-py2.py3-none-any.whl", hash = "sha256:70b4c6a1d9019d7b4f6846832288f86998aa3b9207c6821f3578a6a6a467fe44"},
@@ -1530,6 +1593,6 @@ yarl = [
     {file = "yarl-1.4.2.tar.gz", hash = "sha256:58cd9c469eced558cd81aa3f484b2924e8897049e06889e8ff2510435b7ef74b"},
 ]
 zipp = [
-    {file = "zipp-3.0.0-py3-none-any.whl", hash = "sha256:12248a63bbdf7548f89cb4c7cda4681e537031eda29c02ea29674bc6854460c2"},
-    {file = "zipp-3.0.0.tar.gz", hash = "sha256:7c0f8e91abc0dc07a5068f315c52cb30c66bfbc581e5b50704c8a2f6ebae794a"},
+    {file = "zipp-3.1.0-py3-none-any.whl", hash = "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b"},
+    {file = "zipp-3.1.0.tar.gz", hash = "sha256:c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96"},
 ]
diff --git a/pyproject.toml b/pyproject.toml
index 63d535cd..bd067961 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,13 +32,13 @@ classifiers = [
 
 [tool.poetry.dependencies]
 python = "^3.7"
+httpx = "^0.12"
 aiohttp = "^3.6"
 pydantic = "^1.2"
 Babel = "^2.7"
 aiofiles = "^0.4.0"
 uvloop = {version = "^0.14.0", markers = "sys_platform == 'darwin' or sys_platform == 'linux'", optional = true}
 async_lru = "^1.0"
-httpx = "^0.12.0"
 
 [tool.poetry.dev-dependencies]
 uvloop = {version = "^0.14.0", markers = "sys_platform == 'darwin' or sys_platform == 'linux'"}
diff --git a/tests/test_api/test_client/test_session/test_httpx_session.py b/tests/test_api/test_client/test_session/test_httpx_session.py
index df4bba79..9db80f72 100644
--- a/tests/test_api/test_client/test_session/test_httpx_session.py
+++ b/tests/test_api/test_client/test_session/test_httpx_session.py
@@ -1,16 +1,13 @@
 import re
 from typing import AsyncContextManager, AsyncGenerator
 
-import aiohttp
 import httpx
 import pytest
 import respx
-from aresponses import ResponsesMockServer
 from pip._vendor.packaging.version import Version
 from respx import HTTPXMock
 
 from aiogram.api.client.session.httpx import HttpxSession
-from aiogram.api.client.telegram import PRODUCTION
 from aiogram.api.methods import Request, TelegramMethod
 from aiogram.api.types import InputFile
 
@@ -114,8 +111,9 @@ class TestHttpxSession:
             assert patched_raise_for_status.called_once()
 
     # Update right Version if httpx still didn't implement it
+    # https://github.com/encode/httpx/issues/394
     @pytest.mark.skipif(
-        Version(httpx.__version__) <= Version("0.12.0"),
+        Version(httpx.__version__) <= Version("0.12"),
         reason="old httpx doesn't support chunk_size",
     )
     @pytest.mark.asyncio