diff --git a/poetry.lock b/poetry.lock
index c0d7e50..951be27 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -364,7 +364,7 @@ marker = "python_version >= \"3.6.1\" and python_version < \"4.0.0\""
 name = "identify"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
-version = "1.5.4"
+version = "1.5.5"
 
 [package.extras]
 license = ["editdistance"]
@@ -787,6 +787,7 @@ wcwidth = "*"
 [[package]]
 category = "main"
 description = "Run a subprocess in a pseudo terminal"
+marker = "python_version >= \"3.7\" and python_version < \"4.0\" and sys_platform != \"win32\""
 name = "ptyprocess"
 optional = false
 python-versions = "*"
@@ -1171,7 +1172,7 @@ version = "1.12.1"
 [[package]]
 category = "main"
 description = "Backport of pathlib-compatible object wrapper for zip files"
-marker = "python_version >= \"3.5\" and python_version < \"3.8\" or python_version < \"3.8\" or python_version >= \"3.6.1\" and python_version < \"3.8\" or python_version >= \"3.5\" and python_version < \"3.8\" and (python_version >= \"3.5\" and python_version < \"3.8\" or python_version < \"3.8\" or python_version >= \"3.6.1\" and python_version < \"3.8\") or python_version >= \"3.6.1\" and python_version < \"3.7\" or python_version >= \"3.6.1\" and python_version < \"3.7\" and (python_version >= \"3.6.1\" and python_version < \"3.7\" or python_version < \"3.7\") or python_version >= \"3.6.1\" and python_version < \"3.8\" and (python_version >= \"3.5\" and python_version < \"3.8\" or python_version < \"3.8\" or python_version >= \"3.6.1\" and python_version < \"3.8\")"
+marker = "python_version >= \"3.5\" and python_version < \"3.8\" or python_version < \"3.8\" or python_version >= \"3.6.1\" and python_version < \"3.7\" or python_version >= \"3.6.1\" and python_version < \"3.8\""
 name = "zipp"
 optional = false
 python-versions = ">=3.6"
@@ -1182,7 +1183,7 @@ 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-cov", "jaraco.test (>=3.2.0)", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
 
 [metadata]
-content-hash = "e4a4d7c9fd7fa351a513ea4ab590e227f7c6be042a4a8a3156509f7f5df7a523"
+content-hash = "8df0839a479a0483c969368ef8f61f553773f27bdc0a569603c7141b6c360680"
 python-versions = "^3.6"
 
 [metadata.files]
@@ -1392,8 +1393,8 @@ html5lib = [
     {file = "html5lib-1.1.tar.gz", hash = "sha256:b2e5b40261e20f354d198eae92afc10d750afb487ed5e50f9c4eaf07c184146f"},
 ]
 identify = [
-    {file = "identify-1.5.4-py2.py3-none-any.whl", hash = "sha256:d7da7de6825568daa4449858ce328ecc0e1ada2554d972a6f4f90e736aaf499a"},
-    {file = "identify-1.5.4.tar.gz", hash = "sha256:e4db4796b3b0cf4f9cb921da51430abffff2d4ba7d7c521184ed5252bd90d461"},
+    {file = "identify-1.5.5-py2.py3-none-any.whl", hash = "sha256:da683bfb7669fa749fc7731f378229e2dbf29a1d1337cbde04106f02236eb29d"},
+    {file = "identify-1.5.5.tar.gz", hash = "sha256:7c22c384a2c9b32c5cc891d13f923f6b2653aa83e2d75d8f79be240d6c86c4f4"},
 ]
 idna = [
     {file = "idna-2.10-py2.py3-none-any.whl", hash = "sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0"},
diff --git a/pyproject.toml b/pyproject.toml
index 1e3b9bd..135c7d8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ poetry_installer = "tox_poetry_installer"
 
 [tool.poetry.dependencies]
 python = "^3.6"
-poetry = "^1.0.0"
+poetry = ">=1.0.0, <1.1.0"
 tox = "^2.3.0 || ^3.0.0"
 
 [tool.poetry.dev-dependencies]