diff --git a/poetry.lock b/poetry.lock
index be046eb..dc85f6e 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -246,7 +246,7 @@ certifi = "*"
 
 [[package]]
 name = "pytest"
-version = "6.2.1"
+version = "7.0.1"
 description = "pytest: simple powerful testing with Python"
 category = "dev"
 optional = false
@@ -259,12 +259,12 @@ colorama = {version = "*", markers = "sys_platform == \"win32\""}
 importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 iniconfig = "*"
 packaging = "*"
-pluggy = ">=0.12,<1.0.0a1"
+pluggy = ">=0.12,<2.0"
 py = ">=1.8.2"
-toml = "*"
+tomli = ">=1.0.0"
 
 [package.extras]
-testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
+testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "xmlschema"]
 
 [[package]]
 name = "pytz"
@@ -417,12 +417,12 @@ lint = ["flake8", "mypy", "docutils-stubs"]
 test = ["pytest"]
 
 [[package]]
-name = "toml"
-version = "0.10.2"
-description = "Python Library for Tom's Obvious, Minimal Language"
+name = "tomli"
+version = "1.2.3"
+description = "A lil' TOML parser"
 category = "dev"
 optional = false
-python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+python-versions = ">=3.6"
 
 [[package]]
 name = "typing-extensions"
@@ -460,7 +460,7 @@ testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6"
-content-hash = "fa31de0d50e5c993218ec277535dd7f559977cd94575b68cda99c7c050e3d29e"
+content-hash = "2bb94148d124d0a7f378b189bd1f322c19218dade1ffa56cb231c991c27e346d"
 
 [metadata.files]
 alabaster = [
@@ -599,20 +599,39 @@ markupsafe = [
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     {file = "MarkupSafe-1.1.1-cp35-cp35m-win_amd64.whl", hash = "sha256:9add70b36c5666a2ed02b43b335fe19002ee5235efd4b8a89bfcf9005bebac0d"},
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+    {file = "MarkupSafe-1.1.1-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:d53bc011414228441014aa71dbec320c66468c1030aae3a6e29778a3382d96e5"},
     {file = "MarkupSafe-1.1.1-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:00bc623926325b26bb9605ae9eae8a215691f33cae5df11ca5424f06f2d1f473"},
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     {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:13d3144e1e340870b25e7b10b98d779608c02016d5184cfb9927a9f10c689f42"},
+    {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux2010_i686.whl", hash = "sha256:acf08ac40292838b3cbbb06cfe9b2cb9ec78fce8baca31ddb87aaac2e2dc3bc2"},
+    {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux2010_x86_64.whl", hash = "sha256:d9be0ba6c527163cbed5e0857c451fcd092ce83947944d6c14bc95441203f032"},
+    {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux2014_aarch64.whl", hash = "sha256:caabedc8323f1e93231b52fc32bdcde6db817623d33e100708d9a68e1f53b26b"},
     {file = "MarkupSafe-1.1.1-cp38-cp38-win32.whl", hash = "sha256:596510de112c685489095da617b5bcbbac7dd6384aeebeda4df6025d0256a81b"},
     {file = "MarkupSafe-1.1.1-cp38-cp38-win_amd64.whl", hash = "sha256:e8313f01ba26fbbe36c7be1966a7b7424942f670f38e666995b88d012765b9be"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:d73a845f227b0bfe8a7455ee623525ee656a9e2e749e4742706d80a6065d5e2c"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-manylinux1_i686.whl", hash = "sha256:98bae9582248d6cf62321dcb52aaf5d9adf0bad3b40582925ef7c7f0ed85fceb"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:2beec1e0de6924ea551859edb9e7679da6e4870d32cb766240ce17e0a0ba2014"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-manylinux2010_i686.whl", hash = "sha256:7fed13866cf14bba33e7176717346713881f56d9d2bcebab207f7a036f41b850"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-manylinux2010_x86_64.whl", hash = "sha256:6f1e273a344928347c1290119b493a1f0303c52f5a5eae5f16d74f48c15d4a85"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-manylinux2014_aarch64.whl", hash = "sha256:feb7b34d6325451ef96bc0e36e1a6c0c1c64bc1fbec4b854f4529e51887b1621"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-win32.whl", hash = "sha256:22c178a091fc6630d0d045bdb5992d2dfe14e3259760e713c490da5323866c39"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-win_amd64.whl", hash = "sha256:b7d644ddb4dbd407d31ffb699f1d140bc35478da613b441c582aeb7c43838dd8"},
     {file = "MarkupSafe-1.1.1.tar.gz", hash = "sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b"},
 ]
 packaging = [
@@ -664,8 +683,8 @@ pyproj = [
     {file = "pyproj-3.0.0.post1.tar.gz", hash = "sha256:a49581629cadd29e61fc061d153a4d62ff28b4063c71fe8ca881eeb98cd22017"},
 ]
 pytest = [
-    {file = "pytest-6.2.1-py3-none-any.whl", hash = "sha256:1969f797a1a0dbd8ccf0fecc80262312729afea9c17f1d70ebf85c5e76c6f7c8"},
-    {file = "pytest-6.2.1.tar.gz", hash = "sha256:66e419b1899bc27346cb2c993e12c5e5e8daba9073c1fbce33b9807abc95c306"},
+    {file = "pytest-7.0.1-py3-none-any.whl", hash = "sha256:9ce3ff477af913ecf6321fe337b93a2c0dcf2a0a1439c43f5452112c1e4280db"},
+    {file = "pytest-7.0.1.tar.gz", hash = "sha256:e30905a0c131d3d94b89624a1cc5afec3e0ba2fbdb151867d8e0ebd49850f171"},
 ]
 pytz = [
     {file = "pytz-2020.5-py2.py3-none-any.whl", hash = "sha256:16962c5fb8db4a8f63a26646d8886e9d769b6c511543557bc84e9569fb9a9cb4"},
@@ -711,9 +730,9 @@ sphinxcontrib-serializinghtml = [
     {file = "sphinxcontrib-serializinghtml-1.1.4.tar.gz", hash = "sha256:eaa0eccc86e982a9b939b2b82d12cc5d013385ba5eadcc7e4fed23f4405f77bc"},
     {file = "sphinxcontrib_serializinghtml-1.1.4-py2.py3-none-any.whl", hash = "sha256:f242a81d423f59617a8e5cf16f5d4d74e28ee9a66f9e5b637a18082991db5a9a"},
 ]
-toml = [
-    {file = "toml-0.10.2-py2.py3-none-any.whl", hash = "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b"},
-    {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
+tomli = [
+    {file = "tomli-1.2.3-py3-none-any.whl", hash = "sha256:e3069e4be3ead9668e21cb9b074cd948f7b3113fd9c8bba083f48247aab8b11c"},
+    {file = "tomli-1.2.3.tar.gz", hash = "sha256:05b6166bff487dc068d322585c7ea4ef78deed501cc124060e0f238e89a9231f"},
 ]
 typing-extensions = [
     {file = "typing_extensions-3.7.4.3-py2-none-any.whl", hash = "sha256:dafc7639cde7f1b6e1acc0f457842a83e722ccca8eef5270af2d74792619a89f"},
diff --git a/pyproject.toml b/pyproject.toml
index 96658a7..f05c520 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ geographiclib = "^1.50"
 pyproj = "^3.0.0"
 
 [tool.poetry.dev-dependencies]
-pytest = "^6.2.1"
+pytest = "^7.0.1"
 sphinx = "^3.4.3"
 sphinx-rtd-theme = "^0.5.1"
 coveralls = "^3.0.0"