diff --git a/poetry.lock b/poetry.lock
index 1de0189..486f18a 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -126,6 +126,14 @@ docs = ["sphinx", "rst.linker"]
 testing = ["packaging", "importlib-resources"]
 
 [[package]]
+name = "iniconfig"
+version = "1.1.1"
+description = "iniconfig: brain-dead simple config-ini parsing"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
 name = "isort"
 version = "4.3.21"
 description = "A Python utility / library to sort Python imports."
@@ -178,12 +186,15 @@ optional = false
 python-versions = "*"
 
 [[package]]
-name = "more-itertools"
-version = "8.2.0"
-description = "More routines for operating on iterables, beyond itertools"
+name = "packaging"
+version = "20.8"
+description = "Core utilities for Python packages"
 category = "dev"
 optional = false
-python-versions = ">=3.5"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[package.dependencies]
+pyparsing = ">=2.0.2"
 
 [[package]]
 name = "pathspec"
@@ -209,7 +220,7 @@ dev = ["pre-commit", "tox"]
 
 [[package]]
 name = "py"
-version = "1.8.1"
+version = "1.10.0"
 description = "library with cross-python path, ini-parsing, io, code, log facilities"
 category = "dev"
 optional = false
@@ -230,21 +241,34 @@ isort = ">=4.2.5,<5"
 mccabe = ">=0.6,<0.7"
 
 [[package]]
+name = "pyparsing"
+version = "2.4.7"
+description = "Python parsing module"
+category = "dev"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
 name = "pytest"
-version = "3.10.1"
+version = "6.2.1"
 description = "pytest: simple powerful testing with Python"
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+python-versions = ">=3.6"
 
 [package.dependencies]
-atomicwrites = ">=1.0"
-attrs = ">=17.4.0"
+atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
+attrs = ">=19.2.0"
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
-more-itertools = ">=4.0.0"
-pluggy = ">=0.7"
-py = ">=1.5.0"
-six = ">=1.10.0"
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
+iniconfig = "*"
+packaging = "*"
+pluggy = ">=0.12,<1.0.0a1"
+py = ">=1.8.2"
+toml = "*"
+
+[package.extras]
+testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
 name = "regex"
@@ -309,7 +333,7 @@ testing = ["jaraco.itertools", "func-timeout"]
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6"
-content-hash = "1aaead8f312a9038265cc6b051bfc2ac0e5b164fb6882014c5342209705a7618"
+content-hash = "eaea28dae44851f383c06f8bd558a612247dac283eba0a4de6cdc55ff6b98677"
 
 [metadata.files]
 appdirs = [
@@ -369,6 +393,10 @@ importlib-metadata = [
     {file = "importlib_metadata-1.5.0-py2.py3-none-any.whl", hash = "sha256:b97607a1a18a5100839aec1dc26a1ea17ee0d93b20b0f008d80a5a050afb200b"},
     {file = "importlib_metadata-1.5.0.tar.gz", hash = "sha256:06f5b3a99029c7134207dd882428a66992a9de2bef7c2b699b5641f9886c3302"},
 ]
+iniconfig = [
+    {file = "iniconfig-1.1.1-py2.py3-none-any.whl", hash = "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3"},
+    {file = "iniconfig-1.1.1.tar.gz", hash = "sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32"},
+]
 isort = [
     {file = "isort-4.3.21-py2.py3-none-any.whl", hash = "sha256:6e811fcb295968434526407adb8796944f1988c5b65e8139058f2014cbe100fd"},
     {file = "isort-4.3.21.tar.gz", hash = "sha256:54da7e92468955c4fceacd0c86bd0ec997b0e1ee80d97f67c35a78b719dccab1"},
@@ -439,9 +467,9 @@ mccabe = [
     {file = "mccabe-0.6.1-py2.py3-none-any.whl", hash = "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42"},
     {file = "mccabe-0.6.1.tar.gz", hash = "sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f"},
 ]
-more-itertools = [
-    {file = "more-itertools-8.2.0.tar.gz", hash = "sha256:b1ddb932186d8a6ac451e1d95844b382f55e12686d51ca0c68b6f61f2ab7a507"},
-    {file = "more_itertools-8.2.0-py3-none-any.whl", hash = "sha256:5dd8bcf33e5f9513ffa06d5ad33d78f31e1931ac9a18f33d37e77a180d393a7c"},
+packaging = [
+    {file = "packaging-20.8-py2.py3-none-any.whl", hash = "sha256:24e0da08660a87484d1602c30bb4902d74816b6985b93de36926f5bc95741858"},
+    {file = "packaging-20.8.tar.gz", hash = "sha256:78598185a7008a470d64526a8059de9aaa449238f280fc9eb6b13ba6c4109093"},
 ]
 pathspec = [
     {file = "pathspec-0.7.0-py2.py3-none-any.whl", hash = "sha256:163b0632d4e31cef212976cf57b43d9fd6b0bac6e67c26015d611a647d5e7424"},
@@ -452,16 +480,20 @@ pluggy = [
     {file = "pluggy-0.13.1.tar.gz", hash = "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0"},
 ]
 py = [
-    {file = "py-1.8.1-py2.py3-none-any.whl", hash = "sha256:c20fdd83a5dbc0af9efd622bee9a5564e278f6380fffcacc43ba6f43db2813b0"},
-    {file = "py-1.8.1.tar.gz", hash = "sha256:5e27081401262157467ad6e7f851b7aa402c5852dbcb3dae06768434de5752aa"},
+    {file = "py-1.10.0-py2.py3-none-any.whl", hash = "sha256:3b80836aa6d1feeaa108e046da6423ab8f6ceda6468545ae8d02d9d58d18818a"},
+    {file = "py-1.10.0.tar.gz", hash = "sha256:21b81bda15b66ef5e1a777a21c4dcd9c20ad3efd0b3f817e7a809035269e1bd3"},
 ]
 pylint = [
     {file = "pylint-2.4.4-py3-none-any.whl", hash = "sha256:886e6afc935ea2590b462664b161ca9a5e40168ea99e5300935f6591ad467df4"},
     {file = "pylint-2.4.4.tar.gz", hash = "sha256:3db5468ad013380e987410a8d6956226963aed94ecb5f9d3a28acca6d9ac36cd"},
 ]
+pyparsing = [
+    {file = "pyparsing-2.4.7-py2.py3-none-any.whl", hash = "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"},
+    {file = "pyparsing-2.4.7.tar.gz", hash = "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1"},
+]
 pytest = [
-    {file = "pytest-3.10.1-py2.py3-none-any.whl", hash = "sha256:3f193df1cfe1d1609d4c583838bea3d532b18d6160fd3f55c9447fdca30848ec"},
-    {file = "pytest-3.10.1.tar.gz", hash = "sha256:e246cf173c01169b9617fc07264b7b1316e78d7a650055235d6d897bc80d9660"},
+    {file = "pytest-6.2.1-py3-none-any.whl", hash = "sha256:1969f797a1a0dbd8ccf0fecc80262312729afea9c17f1d70ebf85c5e76c6f7c8"},
+    {file = "pytest-6.2.1.tar.gz", hash = "sha256:66e419b1899bc27346cb2c993e12c5e5e8daba9073c1fbce33b9807abc95c306"},
 ]
 regex = [
     {file = "regex-2020.2.20-cp27-cp27m-win32.whl", hash = "sha256:99272d6b6a68c7ae4391908fc15f6b8c9a6c345a46b632d7fdb7ef6c883a2bbb"},
diff --git a/pyproject.toml b/pyproject.toml
index 7008e50..c31a936 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,7 @@ jinja2 = "^2.10"
 contextvars = { version = "^2.4", python = "~3.6" }
 
 [tool.poetry.dev-dependencies]
-pytest = "^3.0"
+pytest = "^6.2"
 pylint = "^2.4"
 black = {version = "^19.0", allow-prereleases = true}
 rope = "^0.14.0"