diff --git a/poetry.lock b/poetry.lock
index 80a1f6a..51da83b 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -80,7 +80,7 @@ description = "Optional static typing for Python"
 name = "mypy"
 optional = false
 python-versions = ">=3.5"
-version = "0.761"
+version = "0.781"
 
 [package.dependencies]
 mypy-extensions = ">=0.4.3,<0.5.0"
@@ -216,7 +216,7 @@ python-versions = "*"
 version = "0.1.8"
 
 [metadata]
-content-hash = "50fc44b1978e47da45606d65ed77103e2d62cd13c33fd7a77175c7346a715621"
+content-hash = "930952509e0bd35adc0ee4c3a579683786c0758bac4f9935a6f88bfa92deb066"
 python-versions = "^3.8"
 
 [metadata.files]
@@ -249,20 +249,20 @@ more-itertools = [
     {file = "more_itertools-8.1.0-py3-none-any.whl", hash = "sha256:1a2a32c72400d365000412fe08eb4a24ebee89997c18d3d147544f70f5403b39"},
 ]
 mypy = [
-    {file = "mypy-0.761-cp35-cp35m-macosx_10_6_x86_64.whl", hash = "sha256:7f672d02fffcbace4db2b05369142e0506cdcde20cea0e07c7c2171c4fd11dd6"},
-    {file = "mypy-0.761-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:87c556fb85d709dacd4b4cb6167eecc5bbb4f0a9864b69136a0d4640fdc76a36"},
-    {file = "mypy-0.761-cp35-cp35m-win_amd64.whl", hash = "sha256:c6d27bd20c3ba60d5b02f20bd28e20091d6286a699174dfad515636cb09b5a72"},
-    {file = "mypy-0.761-cp36-cp36m-macosx_10_6_x86_64.whl", hash = "sha256:4b9365ade157794cef9685791032521233729cb00ce76b0ddc78749abea463d2"},
-    {file = "mypy-0.761-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:634aef60b4ff0f650d3e59d4374626ca6153fcaff96ec075b215b568e6ee3cb0"},
-    {file = "mypy-0.761-cp36-cp36m-win_amd64.whl", hash = "sha256:53ea810ae3f83f9c9b452582261ea859828a9ed666f2e1ca840300b69322c474"},
-    {file = "mypy-0.761-cp37-cp37m-macosx_10_6_x86_64.whl", hash = "sha256:0a9a45157e532da06fe56adcfef8a74629566b607fa2c1ac0122d1ff995c748a"},
-    {file = "mypy-0.761-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:7eadc91af8270455e0d73565b8964da1642fe226665dd5c9560067cd64d56749"},
-    {file = "mypy-0.761-cp37-cp37m-win_amd64.whl", hash = "sha256:e2bb577d10d09a2d8822a042a23b8d62bc3b269667c9eb8e60a6edfa000211b1"},
-    {file = "mypy-0.761-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:2c35cae79ceb20d47facfad51f952df16c2ae9f45db6cb38405a3da1cf8fc0a7"},
-    {file = "mypy-0.761-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:f97a605d7c8bc2c6d1172c2f0d5a65b24142e11a58de689046e62c2d632ca8c1"},
-    {file = "mypy-0.761-cp38-cp38-win_amd64.whl", hash = "sha256:a6bd44efee4dc8c3324c13785a9dc3519b3ee3a92cada42d2b57762b7053b49b"},
-    {file = "mypy-0.761-py3-none-any.whl", hash = "sha256:7e396ce53cacd5596ff6d191b47ab0ea18f8e0ec04e15d69728d530e86d4c217"},
-    {file = "mypy-0.761.tar.gz", hash = "sha256:85baab8d74ec601e86134afe2bcccd87820f79d2f8d5798c889507d1088287bf"},
+    {file = "mypy-0.781-cp35-cp35m-macosx_10_6_x86_64.whl", hash = "sha256:43335f3ff3288eb877de6d186ec08e10ea61093405189678756e14c7ccee4a9b"},
+    {file = "mypy-0.781-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:d7c9255ba6626e1745bd68e1b85e3d7888844eaf38252fefb8157194e55fd3e9"},
+    {file = "mypy-0.781-cp35-cp35m-win_amd64.whl", hash = "sha256:1fe322a51df7ec60e4060c358422732359dda4467c1bd240f2172433b26b39be"},
+    {file = "mypy-0.781-cp36-cp36m-macosx_10_6_x86_64.whl", hash = "sha256:e60674723cad7b7c7fc4e9075f7a9d5d927d23d290e30cf86aeb987ef135ca1d"},
+    {file = "mypy-0.781-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:e2f193a2076e4508a88c93c25348a1cea5e6b717ee50b4422a001e9ac819c3d5"},
+    {file = "mypy-0.781-cp36-cp36m-win_amd64.whl", hash = "sha256:845abd8a9537da01e6b96f091e2d6d4ece18e52339f81f9fbbac1b6db2aa8d2d"},
+    {file = "mypy-0.781-cp37-cp37m-macosx_10_6_x86_64.whl", hash = "sha256:2bc1fe8f793f1b1809afd6f57c2d9b948e1bf525a78e4c2957392a383c86a4a4"},
+    {file = "mypy-0.781-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:ca56382e6ebdeb3cb928ae4ce87031cc752a1eca40ff86abc14dc712def41798"},
+    {file = "mypy-0.781-cp37-cp37m-win_amd64.whl", hash = "sha256:738a8df84da4e9ce1f59cbdebc7d1d03310149405df9a95308d4f2a62a6d7c13"},
+    {file = "mypy-0.781-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:b0c6ae0cb991a7a11013d0cc7edf8343184465b6e2dcbb9e44265c7bb3fde3af"},
+    {file = "mypy-0.781-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:ec45f2a5935b291d86974a24e09676e467ac108d0c7ce94de44d7650c43a5805"},
+    {file = "mypy-0.781-cp38-cp38-win_amd64.whl", hash = "sha256:d6e9611ae026be70604672cd71bee468cb231078d8d9b3d6b43f8dcbd4d9b776"},
+    {file = "mypy-0.781-py3-none-any.whl", hash = "sha256:5c75603ea44bffad0356df333bd1b411facad321e0692d6b0687d65d94fcd8e1"},
+    {file = "mypy-0.781.tar.gz", hash = "sha256:94bb664868b5cf4ca1147d875a4c77883d8c605cf2e916853006e4c6194f1e84"},
 ]
 mypy-extensions = [
     {file = "mypy_extensions-0.4.3-py2.py3-none-any.whl", hash = "sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d"},
diff --git a/pyproject.toml b/pyproject.toml
index 7627251..666d283 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ python = "^3.8"
 Click = "^7.0"
 
 [tool.poetry.dev-dependencies]
-mypy = "^0.761"
+mypy = "^0.781"
 black = "^19.10b0"
 pytest = "^5.3.4"