diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 011609c..13b1ce1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
 
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
diff --git a/pyproject.toml b/pyproject.toml
index 95200e2..d5e2f54 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ classifiers = [
     "Topic :: Internet :: Name Service (DNS)",
     "Topic :: System :: Networking",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "cloudflare",
     "netifaces",
@@ -49,7 +49,7 @@ Repository = "https://github.com/welchworks/cflan"
 Issues = "https://github.com/welchworks/cflan/issues"
 
 [tool.ruff]
-target-version = "py39"
+target-version = "py310"
 line-length = 88
 indent-width = 4
 
@@ -84,7 +84,7 @@ paths = ["set_dns.py", "install.py"]
 min_confidence = 80
 
 [tool.mypy]
-python_version = "3.9"
+python_version = "3.10"
 warn_return_any = true
 warn_unused_configs = true
 ignore_missing_imports = true
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 0ce5c41..5b85a99 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,14 +2,14 @@
 # Install with: pip install -r requirements-dev.txt
 
 # Testing
-pytest>=8.4.2
+pytest>=9.1.1
 pytest-cov>=7.1.0
 
 # Type checking
-mypy>=1.19.1
+mypy>=2.3.1
 types-PyYAML
 types-requests
 
 # Linting and formatting (via pre-commit)
-pre-commit>=4.3.0
+pre-commit>=4.6.2
 vulture>=2.16