diff --git a/poetry.lock b/poetry.lock
index a9144e2..9b04a1f 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -112,12 +112,12 @@ perf = ["ipython"]
 testing = ["pytest (>=6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-cov", "pytest-enabler (>=1.0.1)", "packaging", "pyfakefs", "flufl.flake8", "pytest-perf (>=0.9.2)", "pytest-black (>=0.3.7)", "pytest-mypy (>=0.9.1)", "importlib-resources (>=1.3)"]
 
 [[package]]
-name = "more-itertools"
-version = "8.13.0"
-description = "More routines for operating on iterables, beyond itertools"
+name = "iniconfig"
+version = "1.1.1"
+description = "iniconfig: brain-dead simple config-ini parsing"
 category = "dev"
 optional = false
-python-versions = ">=3.5"
+python-versions = "*"
 
 [[package]]
 name = "nodeenv"
@@ -127,6 +127,17 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "packaging"
+version = "21.3"
+description = "Core utilities for Python packages"
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+pyparsing = ">=2.0.2,<3.0.5 || >3.0.5"
+
 [[package]]
 name = "parse"
 version = "1.19.0"
@@ -198,6 +209,17 @@ python-versions = "*"
 [package.dependencies]
 requests = ">=2"
 
+[[package]]
+name = "pyparsing"
+version = "3.0.9"
+description = "pyparsing module - Classes and methods to define and execute parsing grammars"
+category = "dev"
+optional = false
+python-versions = ">=3.6.8"
+
+[package.extras]
+diagrams = ["railroad-diagrams", "jinja2"]
+
 [[package]]
 name = "pyside2"
 version = "5.15.2.1"
@@ -211,20 +233,25 @@ shiboken2 = "5.15.2.1"
 
 [[package]]
 name = "pytest"
-version = "3.10.1"
+version = "6.2.5"
 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,<2.0"
+py = ">=1.8.2"
+toml = "*"
+
+[package.extras]
+testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
 name = "pytest-fixtures"
@@ -339,7 +366,7 @@ testing = ["pytest (>=6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-
 [metadata]
 lock-version = "1.1"
 python-versions = ">=3.7,<3.11"
-content-hash = "a9a91de65950bfd758c2a8763d15b6eb5a400a8bfdf8dbcc53c6d0819c6b582d"
+content-hash = "6f2430db1553a2762c44c14aad3d8529b455a74ecb0127a7ba71b1c7ef980518"
 
 [metadata.files]
 atomicwrites = [
@@ -386,14 +413,18 @@ importlib-metadata = [
     {file = "importlib_metadata-4.11.4-py3-none-any.whl", hash = "sha256:c58c8eb8a762858f49e18436ff552e83914778e50e9d2f1660535ffb364552ec"},
     {file = "importlib_metadata-4.11.4.tar.gz", hash = "sha256:5d26852efe48c0a32b0509ffbc583fda1a2266545a78d104a6f4aff3db17d700"},
 ]
-more-itertools = [
-    {file = "more-itertools-8.13.0.tar.gz", hash = "sha256:a42901a0a5b169d925f6f217cd5a190e32ef54360905b9c39ee7db5313bfec0f"},
-    {file = "more_itertools-8.13.0-py3-none-any.whl", hash = "sha256:c5122bffc5f104d37c1626b8615b511f3427aa5389b94d61e5ef8236bfbc3ddb"},
+iniconfig = [
+    {file = "iniconfig-1.1.1-py2.py3-none-any.whl", hash = "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3"},
+    {file = "iniconfig-1.1.1.tar.gz", hash = "sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32"},
 ]
 nodeenv = [
     {file = "nodeenv-1.6.0-py2.py3-none-any.whl", hash = "sha256:621e6b7076565ddcacd2db0294c0381e01fd28945ab36bcf00f41c5daf63bef7"},
     {file = "nodeenv-1.6.0.tar.gz", hash = "sha256:3ef13ff90291ba2a4a7a4ff9a979b63ffdd00a464dbe04acf0ea6471517a4c2b"},
 ]
+packaging = [
+    {file = "packaging-21.3-py3-none-any.whl", hash = "sha256:ef103e05f519cdc783ae24ea4e2e0f508a9c99b2d4969652eed6a2e1ea5bd522"},
+    {file = "packaging-21.3.tar.gz", hash = "sha256:dd47c42927d89ab911e606518907cc2d3a1f38bbd026385970643f9c5b8ecfeb"},
+]
 parse = [
     {file = "parse-1.19.0.tar.gz", hash = "sha256:9ff82852bcb65d139813e2a5197627a94966245c897796760a3a2a8eb66f020b"},
 ]
@@ -417,6 +448,10 @@ pyedid = [
     {file = "pyedid-1.0.1-py3-none-any.whl", hash = "sha256:c82c7f8462069b941efdb530a82109378403e2540170b7344f8fe1315cb5252a"},
     {file = "pyedid-1.0.1.tar.gz", hash = "sha256:8051a33ed3df4d3b85cf301086b387bd8a9e9be1b93974d4ba7d7b5aeef97f9e"},
 ]
+pyparsing = [
+    {file = "pyparsing-3.0.9-py3-none-any.whl", hash = "sha256:5026bae9a10eeaefb61dab2f09052b9f4307d44aee4eda64b309723d8d206bbc"},
+    {file = "pyparsing-3.0.9.tar.gz", hash = "sha256:2b020ecf7d21b687f219b71ecad3631f644a47f01403fa1d1036b0c6416d70fb"},
+]
 pyside2 = [
     {file = "PySide2-5.15.2.1-5.15.2-cp27-cp27m-macosx_10_13_intel.whl", hash = "sha256:b5e1d92f26b0bbaefff67727ccbb2e1b577f2c0164b349b3d6e80febb4c5bde2"},
     {file = "PySide2-5.15.2.1-5.15.2-cp27-cp27mu-manylinux1_x86_64.whl", hash = "sha256:235240b6ec8206d9fdf0232472c6ef3241783d480425e5b54796f06e39ed23da"},
@@ -426,8 +461,8 @@ pyside2 = [
     {file = "PySide2-5.15.2.1-5.15.2-cp35.cp36.cp37.cp38.cp39.cp310-none-win_amd64.whl", hash = "sha256:af6b263fe63ba6dea7eaebae80aa7b291491fe66f4f0057c0aafe780cc83da9d"},
 ]
 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-6.2.5-py3-none-any.whl", hash = "sha256:7310f8d27bc79ced999e760ca304d69f6ba6c6649c0b60fb0e04a4a77cacc134"},
+    {file = "pytest-6.2.5.tar.gz", hash = "sha256:131b36680866a76e6781d13f101efb86cf674ebb9762eb70d3082b6f29889e89"},
 ]
 pytest-fixtures = [
     {file = "pytest-fixtures-0.1.0.tar.gz", hash = "sha256:28f13dc9fb9206f4a5fba1a100e1b3de20fbfa37a7af440ca07222fa45b85b7b"},
diff --git a/pyproject.toml b/pyproject.toml
index dfbd06c..4eb3c7f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ parse = ">1.0"
 
 
 [tool.poetry.dev-dependencies]
-pytest = "^3.0"
+pytest = "^6"
 pytest-fixtures = "^0.1.0"
 pre-commit = "^2.19"