diff --git a/poetry.lock b/poetry.lock
index e4dbda8..f0fd565 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -357,7 +357,7 @@ description = "Optional static typing for Python"
 name = "mypy"
 optional = false
 python-versions = ">=3.5"
-version = "0.770"
+version = "0.780"
 
 [package.dependencies]
 mypy-extensions = ">=0.4.3,<0.5.0"
@@ -705,7 +705,7 @@ docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["jaraco.itertools", "func-timeout"]
 
 [metadata]
-content-hash = "c99294c2c15045602dc3206425c66d337f1ce092291c6ecd596748eefdf07b11"
+content-hash = "df51257e93cc1e308ea04e975ac76b9d4c3ae9c42754ad39d8b70a37abdf32b6"
 python-versions = "^3.7"
 
 [metadata.files]
@@ -860,20 +860,20 @@ more-itertools = [
     {file = "more_itertools-8.3.0-py3-none-any.whl", hash = "sha256:7818f596b1e87be009031c7653d01acc46ed422e6656b394b0f765ce66ed4982"},
 ]
 mypy = [
-    {file = "mypy-0.770-cp35-cp35m-macosx_10_6_x86_64.whl", hash = "sha256:a34b577cdf6313bf24755f7a0e3f3c326d5c1f4fe7422d1d06498eb25ad0c600"},
-    {file = "mypy-0.770-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:86c857510a9b7c3104cf4cde1568f4921762c8f9842e987bc03ed4f160925754"},
-    {file = "mypy-0.770-cp35-cp35m-win_amd64.whl", hash = "sha256:a8ffcd53cb5dfc131850851cc09f1c44689c2812d0beb954d8138d4f5fc17f65"},
-    {file = "mypy-0.770-cp36-cp36m-macosx_10_6_x86_64.whl", hash = "sha256:7687f6455ec3ed7649d1ae574136835a4272b65b3ddcf01ab8704ac65616c5ce"},
-    {file = "mypy-0.770-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:3beff56b453b6ef94ecb2996bea101a08f1f8a9771d3cbf4988a61e4d9973761"},
-    {file = "mypy-0.770-cp36-cp36m-win_amd64.whl", hash = "sha256:15b948e1302682e3682f11f50208b726a246ab4e6c1b39f9264a8796bb416aa2"},
-    {file = "mypy-0.770-cp37-cp37m-macosx_10_6_x86_64.whl", hash = "sha256:b90928f2d9eb2f33162405f32dde9f6dcead63a0971ca8a1b50eb4ca3e35ceb8"},
-    {file = "mypy-0.770-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:c56ffe22faa2e51054c5f7a3bc70a370939c2ed4de308c690e7949230c995913"},
-    {file = "mypy-0.770-cp37-cp37m-win_amd64.whl", hash = "sha256:8dfb69fbf9f3aeed18afffb15e319ca7f8da9642336348ddd6cab2713ddcf8f9"},
-    {file = "mypy-0.770-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:219a3116ecd015f8dca7b5d2c366c973509dfb9a8fc97ef044a36e3da66144a1"},
-    {file = "mypy-0.770-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:7ec45a70d40ede1ec7ad7f95b3c94c9cf4c186a32f6bacb1795b60abd2f9ef27"},
-    {file = "mypy-0.770-cp38-cp38-win_amd64.whl", hash = "sha256:f91c7ae919bbc3f96cd5e5b2e786b2b108343d1d7972ea130f7de27fdd547cf3"},
-    {file = "mypy-0.770-py3-none-any.whl", hash = "sha256:3b1fc683fb204c6b4403a1ef23f0b1fac8e4477091585e0c8c54cbdf7d7bb164"},
-    {file = "mypy-0.770.tar.gz", hash = "sha256:8a627507ef9b307b46a1fea9513d5c98680ba09591253082b4c48697ba05a4ae"},
+    {file = "mypy-0.780-cp35-cp35m-macosx_10_6_x86_64.whl", hash = "sha256:d3b4941de44341227ece1caaf5b08b23e42ad4eeb8b603219afb11e9d4cfb437"},
+    {file = "mypy-0.780-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:1f3976a945ad7f0a0727aafdc5651c2d3278e3c88dee94e2bf75cd3386b7b2f4"},
+    {file = "mypy-0.780-cp35-cp35m-win_amd64.whl", hash = "sha256:eadb865126da4e3c4c95bdb47fe1bb087a3e3ea14d39a3b13224b8a4d9f9a102"},
+    {file = "mypy-0.780-cp36-cp36m-macosx_10_6_x86_64.whl", hash = "sha256:75eed74d2faf2759f79c5f56f17388defd2fc994222312ec54ee921e37b31ad4"},
+    {file = "mypy-0.780-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:2f8c098f12b402c19b735aec724cc9105cc1a9eea405d08814eb4b14a6fb1a41"},
+    {file = "mypy-0.780-cp36-cp36m-win_amd64.whl", hash = "sha256:62eb5dd4ea86bda8ce386f26684f7f26e4bfe6283c9f2b6ca6d17faf704dcfad"},
+    {file = "mypy-0.780-cp37-cp37m-macosx_10_6_x86_64.whl", hash = "sha256:00cb1964a7476e871d6108341ac9c1a857d6bd20bf5877f4773ac5e9d92cd3cd"},
+    {file = "mypy-0.780-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:974bebe3699b9b46278a7f076635d219183da26e1a675c1f8243a69221758273"},
+    {file = "mypy-0.780-cp37-cp37m-win_amd64.whl", hash = "sha256:64c36eb0936d0bfb7d8da49f92c18e312ad2e3ed46e5548ae4ca997b0d33bd59"},
+    {file = "mypy-0.780-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:d31291df31bafb997952dc0a17ebb2737f802c754aed31dd155a8bfe75112c57"},
+    {file = "mypy-0.780-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:a5e5bb12b7982b179af513dddb06fca12285f0316d74f3964078acbfcf4c68f2"},
+    {file = "mypy-0.780-cp38-cp38-win_amd64.whl", hash = "sha256:5d142f219bf8c7894dfa79ebfb7d352c4c63a325e75f10dfb4c3db9417dcd135"},
+    {file = "mypy-0.780-py3-none-any.whl", hash = "sha256:127de5a9b817a03a98c5ae8a0c46a20dc44442af6dcfa2ae7f96cb519b312efa"},
+    {file = "mypy-0.780.tar.gz", hash = "sha256:4ef13b619a289aa025f2273e05e755f8049bb4eaba6d703a425de37d495d178d"},
 ]
 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 d5398ee..674c1d5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ flake8-black = "^0.2.0"
 flake8-bugbear = "^20.1.4"
 safety = "^1.8.5"
 pytest = "^5.4.3"
-mypy = "^0.770"
+mypy = "^0.780"
 codecov = "^2.1.3"
 reorder-python-imports = "^2.3.1"
 pre-commit = "^2.4.0"