diff --git a/poetry.lock b/poetry.lock
index d6262e4b7..19ecc1ce2 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -477,19 +477,28 @@ yaml = ["PyYAML (>=5.1.0)"]
 
 [[package]]
 name = "mypy"
-version = "0.800"
+version = "0.820+dev.98ac4874f84dc83e0b9845ef10b73c1799111a7a"
 description = "Optional static typing for Python"
 category = "main"
 optional = false
 python-versions = ">=3.5"
+develop = false
 
 [package.dependencies]
 mypy-extensions = ">=0.4.3,<0.5.0"
-typed-ast = ">=1.4.0,<1.5.0"
+toml = "*"
+typed-ast = {version = ">=1.4.0,<1.5.0", markers = "python_version < \"3.8\""}
 typing-extensions = ">=3.7.4"
 
 [package.extras]
 dmypy = ["psutil (>=4.0)"]
+python2 = ["typed-ast (>=1.4.0,<1.5.0)"]
+
+[package.source]
+type = "git"
+url = "https://github.com/python/mypy.git"
+reference = "master"
+resolved_reference = "98ac4874f84dc83e0b9845ef10b73c1799111a7a"
 
 [[package]]
 name = "mypy-extensions"
@@ -964,7 +973,7 @@ 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 = "f731bd62e9c130760c8b619cf8ef9eb102ac26dcff99834d26e0e356475ab6be"
+content-hash = "81945d7d7961b66a67baa340b48670979cd70721f9df4d0a1e963b72f23812ec"
 
 [metadata.files]
 appdirs = [
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+    {file = "MarkupSafe-1.1.1-cp39-cp39-manylinux2014_aarch64.whl", hash = "sha256:feb7b34d6325451ef96bc0e36e1a6c0c1c64bc1fbec4b854f4529e51887b1621"},
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     {file = "MarkupSafe-1.1.1.tar.gz", hash = "sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b"},
 ]
 mccabe = [
@@ -1238,30 +1266,7 @@ munch = [
     {file = "munch-2.5.0-py2.py3-none-any.whl", hash = "sha256:6f44af89a2ce4ed04ff8de41f70b226b984db10a91dcc7b9ac2efc1c77022fdd"},
     {file = "munch-2.5.0.tar.gz", hash = "sha256:2d735f6f24d4dba3417fa448cae40c6e896ec1fdab6cdb5e6510999758a4dbd2"},
 ]
-mypy = [
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-    {file = "mypy-0.800-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:947126195bfe4709c360e89b40114c6746ae248f04d379dca6f6ab677aa07641"},
-    {file = "mypy-0.800-cp35-cp35m-manylinux2010_x86_64.whl", hash = "sha256:b95068a3ce3b50332c40e31a955653be245666a4bc7819d3c8898aa9fb9ea496"},
-    {file = "mypy-0.800-cp35-cp35m-win_amd64.whl", hash = "sha256:ca7ad5aed210841f1e77f5f2f7d725b62c78fa77519312042c719ed2ab937876"},
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-    {file = "mypy-0.800-py3-none-any.whl", hash = "sha256:3e0c159a7853e3521e3f582adb1f3eac66d0b0639d434278e2867af3a8c62653"},
-    {file = "mypy-0.800.tar.gz", hash = "sha256:e0202e37756ed09daf4b0ba64ad2c245d357659e014c3f51d8cd0681ba66940a"},
-]
+mypy = []
 mypy-extensions = [
     {file = "mypy_extensions-0.4.3-py2.py3-none-any.whl", hash = "sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d"},
     {file = "mypy_extensions-0.4.3.tar.gz", hash = "sha256:2d82818f5bb3e369420cb3c4060a7970edba416647068eb4c5343488a6c604a8"},
diff --git a/pyproject.toml b/pyproject.toml
index 6045db04c..bf82a1bf0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,7 @@ shamir-mnemonic = "^0.2.1"
 fido2 = "^0.8.0"
 
 ## typing
-mypy = ">=0.782"
+mypy = {git = "https://github.com/python/mypy.git"}
 typing-extensions = ">=3.7.4"
 
 ## style