diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e863b8d..95820ba 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,6 +28,11 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
         python-version: [3.6,3.7,3.8,3.9]
+        exclude:
+          - os: windows-latest
+            python-version: 3.6
+          - os: windows-latest
+            python-version: 3.7
 
     runs-on: ${{ matrix.os }}
     continue-on-error: ${{ matrix.os != 'ubuntu-latest' }}
diff --git a/project/mkdocs.yml.jinja b/project/mkdocs.yml.jinja
index 6e37603..3354d45 100644
--- a/project/mkdocs.yml.jinja
+++ b/project/mkdocs.yml.jinja
@@ -40,7 +40,7 @@ markdown_extensions:
 - pymdownx.tabbed
 - pymdownx.tasklist
 - toc:
-    permalink: "¤"
+    permalink: true
 
 plugins:
 - search
diff --git a/project/pyproject.toml.jinja b/project/pyproject.toml.jinja
index ec9f1f6..3bc5a51 100644
--- a/project/pyproject.toml.jinja
+++ b/project/pyproject.toml.jinja
@@ -15,50 +15,51 @@ keywords = []
 packages = [ { include = "[[ python_package_import_name ]]", from = "src" } ]
 
 [tool.poetry.dependencies]
-python = "^3.6"
+python = ">=3.6.2,<4.0"
 
 [tool.poetry.dev-dependencies]
 # formatting, quality, tests
-autoflake = "^1.4"
-black = "^20.8b1"
-isort = "^5.7.0"
-mypy = "^0.812"
-pytest = "^6.2.2"
-pytest-cov = "^2.11.1"
-pytest-randomly = "^3.5.0"
-pytest-sugar = "^0.9.4"
-pytest-xdist = "^2.2.0"
+autoflake = ">=1.4"
+black = ">=21.12b0"
+isort = ">=5.7.0"
+mypy = ">=0.812"
+pytest = ">=6.2.2"
+pytest-cov = ">=2.11.1"
+pytest-randomly = ">=3.5.0"
+pytest-sugar = ">=0.9.4"
+pytest-xdist = ">=2.2.0"
+types-toml = ">=0.10.1"
 
 # tasks
-duty = "^0.6.0"
-git-changelog = "^0.4.2"
-httpx = "^0.16.1"
-jinja2-cli = "^0.7.0"
-toml = "^0.10.2"
+duty = ">=0.6.0"
+git-changelog = ">=0.5.0"
+httpx = ">=0.16.1"
+jinja2-cli = ">=0.7.0"
+toml = ">=0.10.2"
 
 # flake8 plugins
-darglint = "^1.5.8"
-flake8 = "^3.7.0"
-flake8-bandit = "^2.1.2"
-flake8-black = "^0.2.1"
-flake8-bugbear = "^20.11.1"
-flake8-builtins = "^1.5.3"
-flake8-comprehensions = "^3.3.1"
-flake8-docstrings = "^1.5.0"
-flake8-pytest-style = "^1.3.0"
-flake8-string-format = "^0.3.0"
-flake8-tidy-imports = "^4.2.1"
-flake8-variables-names = "^0.0.4"
-pep8-naming = "^0.11.1"
-pydocstyle = "^6.1.1"
-wps-light = "^0.15.2"
+darglint = ">=1.5.8"
+flake8 = ">=3.7.0"
+flake8-bandit = ">=2.1.2"
+flake8-black = ">=0.2.1"
+flake8-bugbear = ">=20.11.1"
+flake8-builtins = ">=1.5.3"
+flake8-comprehensions = ">=3.3.1"
+flake8-docstrings = ">=1.5.0"
+flake8-pytest-style = ">=1.3.0"
+flake8-string-format = ">=0.3.0"
+flake8-tidy-imports = ">=4.2.1"
+flake8-variables-names = ">=0.0.4"
+pep8-naming = ">=0.11.1"
+pydocstyle = ">=6.1.1"
+wps-light = ">=0.15.2"
 
 # docs
-mkdocs = "^1.1.2"
-mkdocs-coverage = "^0.2.1"
-mkdocs-macros-plugin = "^0.5.0"
-mkdocs-material = "^6.2.7"
-mkdocstrings = "^0.15.0"
+mkdocs = ">=1.2.2"
+mkdocs-coverage = ">=0.2.1"
+mkdocs-macros-plugin = ">=0.5.0"
+mkdocs-material = ">=6.2.7"
+mkdocstrings = ">=0.16.2"
 
 [tool.poetry.scripts]
 [[ python_package_command_line_name ]] = "[[ python_package_import_name ]].cli:main"