diff --git a/poetry.lock b/poetry.lock
index 9cf7acd..b92bbab 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -170,22 +170,6 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 version = "2.8"
 
-[[package]]
-category = "main"
-description = "Read metadata from Python packages"
-marker = "python_version < \"3.8\""
-name = "importlib-metadata"
-optional = false
-python-versions = ">=2.7,!=3.0,!=3.1,!=3.2,!=3.3,!=3.4"
-version = "1.1.0"
-
-[package.dependencies]
-zipp = ">=0.5"
-
-[package.extras]
-docs = ["sphinx", "rst.linker"]
-testing = ["packaging", "importlib-resources"]
-
 [[package]]
 category = "dev"
 description = "Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API."
@@ -212,15 +196,6 @@ version = "1.9"
 msgpack = ">=0.5.6"
 pyyaml = ">=3.13"
 
-[[package]]
-category = "main"
-description = "More routines for operating on iterables, beyond itertools"
-marker = "python_version < \"3.8\""
-name = "more-itertools"
-optional = false
-python-versions = ">=3.5"
-version = "8.0.0"
-
 [[package]]
 category = "dev"
 description = "MessagePack (de)serializer."
@@ -234,17 +209,12 @@ category = "main"
 description = "A module wrapper for os.path"
 name = "path"
 optional = false
-python-versions = ">=3.5"
-version = "13.1.0"
-
-[package.dependencies]
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.5"
+python-versions = ">=3.6"
+version = "15.0.0"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["pytest (>=3.5,<3.7.3 || >3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-black-multipy", "pytest-cov", "appdirs", "packaging", "pygments"]
+testing = ["pytest (>=3.5,<3.7.3 || >3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-black (>=0.3.7)", "pytest-cov", "pytest-mypy", "appdirs", "packaging", "pygments"]
 
 [[package]]
 category = "dev"
@@ -373,24 +343,8 @@ brotli = ["brotlipy (>=0.6.0)"]
 secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
 socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
 
-[[package]]
-category = "main"
-description = "Backport of pathlib-compatible object wrapper for zip files"
-marker = "python_version < \"3.8\""
-name = "zipp"
-optional = false
-python-versions = ">=2.7"
-version = "0.6.0"
-
-[package.dependencies]
-more-itertools = "*"
-
-[package.extras]
-docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["pathlib2", "contextlib2", "unittest2"]
-
 [metadata]
-content-hash = "53e0691793798e8a60e49fd862abd1a17f31f1c52a8b98f1f90fc42fe094e4ea"
+content-hash = "b79d84d019213bf357fba1f806090def4416cecf4845def28c2fd592bae8cd47"
 python-versions = "^3.7"
 
 [metadata.files]
@@ -490,10 +444,6 @@ idna = [
     {file = "idna-2.8-py2.py3-none-any.whl", hash = "sha256:ea8b7f6188e6fa117537c3df7da9fc686d485087abf6ac197f9c46432f7e4a3c"},
     {file = "idna-2.8.tar.gz", hash = "sha256:c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407"},
 ]
-importlib-metadata = [
-    {file = "importlib_metadata-1.1.0-py2.py3-none-any.whl", hash = "sha256:e6ac600a142cf2db707b1998382cc7fc3b02befb7273876e01b8ad10b9652742"},
-    {file = "importlib_metadata-1.1.0.tar.gz", hash = "sha256:b044f07694ef14a6683b097ba56bd081dbc7cdc7c7fe46011e499dfecc082f21"},
-]
 lxml = [
     {file = "lxml-4.4.2-cp27-cp27m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl", hash = "sha256:7b4fc7b1ecc987ca7aaf3f4f0e71bbfbd81aaabf87002558f5bc95da3a865bcd"},
     {file = "lxml-4.4.2-cp27-cp27m-manylinux1_i686.whl", hash = "sha256:f6ed60a62c5f1c44e789d2cf14009423cb1646b44a43e40a9cf6a21f077678a1"},
@@ -525,10 +475,6 @@ lxml = [
 mashumaro = [
     {file = "mashumaro-1.9.tar.gz", hash = "sha256:99e066ba40892ef77b589c91220b68780ed6160f6be707f39a2e60b7b885387e"},
 ]
-more-itertools = [
-    {file = "more-itertools-8.0.0.tar.gz", hash = "sha256:53ff73f186307d9c8ef17a9600309154a6ae27f25579e80af4db8f047ba14bc2"},
-    {file = "more_itertools-8.0.0-py3-none-any.whl", hash = "sha256:a0ea684c39bc4315ba7aae406596ef191fd84f873d2d2751f84d64e81a7a2d45"},
-]
 msgpack = [
     {file = "msgpack-0.6.2-cp27-cp27m-manylinux1_i686.whl", hash = "sha256:774f5edc3475917cd95fe593e625d23d8580f9b48b570d8853d06cac171cd170"},
     {file = "msgpack-0.6.2-cp27-cp27m-manylinux1_x86_64.whl", hash = "sha256:a06efd0482a1942aad209a6c18321b5e22d64eb531ea20af138b28172d8f35ba"},
@@ -553,8 +499,8 @@ msgpack = [
     {file = "msgpack-0.6.2.tar.gz", hash = "sha256:ea3c2f859346fcd55fc46e96885301d9c2f7a36d453f5d8f2967840efa1e1830"},
 ]
 path = [
-    {file = "path-13.1.0-py3-none-any.whl", hash = "sha256:41f0db0b6e32b3fc33c0bede630f6b58c7790af3a27c899e0c7ff69143d8696d"},
-    {file = "path-13.1.0.tar.gz", hash = "sha256:97249b37e5e4017429a780920147200a2215e268c1a18fa549fec0b654ce99b7"},
+    {file = "path-15.0.0-py3-none-any.whl", hash = "sha256:f4582f9745fa4f6d640211e1e51f5a050453239ce1d68e2205ac0e633fafc935"},
+    {file = "path-15.0.0.tar.gz", hash = "sha256:521aa0632faea3dbf7bc15549524cfc0f5d62b9a311508e562598f65c8dfda92"},
 ]
 pathspec = [
     {file = "pathspec-0.6.0.tar.gz", hash = "sha256:e285ccc8b0785beadd4c18e5708b12bb8fcf529a1e61215b3feff1d1e559ea5c"},
@@ -646,7 +592,3 @@ urllib3 = [
     {file = "urllib3-1.25.7-py2.py3-none-any.whl", hash = "sha256:a8a318824cc77d1fd4b2bec2ded92646630d7fe8619497b142c84a9e6f5a7293"},
     {file = "urllib3-1.25.7.tar.gz", hash = "sha256:f3c5fd51747d450d4dcf6f923c81f78f811aab8205fda64b0aba34a4e48b0745"},
 ]
-zipp = [
-    {file = "zipp-0.6.0-py2.py3-none-any.whl", hash = "sha256:f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335"},
-    {file = "zipp-0.6.0.tar.gz", hash = "sha256:3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e"},
-]
diff --git a/pyproject.toml b/pyproject.toml
index c8e079e..bb27697 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ python = "^3.7"
 singletons = "0.2.3"
 cached-property = "1.5.1"
 filelock = "3.0.12"
-path = "^13.1.0"
+path = ">=13.1,<16.0"
 
 [tool.poetry.dev-dependencies]
 green = "3.0.0"