diff --git a/.github/workflows/publish-docs.yml b/.github/workflows/publish-docs.yml
index 9aeaa0e..5a64520 100644
--- a/.github/workflows/publish-docs.yml
+++ b/.github/workflows/publish-docs.yml
@@ -19,7 +19,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: '3.9'
+        python-version: '3.10'
     - name: Install dependencies
       run: python -m pip install .[dev]
     - name: Build
diff --git a/.github/workflows/publish-package.yml b/.github/workflows/publish-package.yml
index b98a339..ca2b3e2 100644
--- a/.github/workflows/publish-package.yml
+++ b/.github/workflows/publish-package.yml
@@ -18,7 +18,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: '3.9'
+        python-version: '3.10'
     - name: Install dependencies
       run: python -m pip install .[dev]
     - name: Build and publish
diff --git a/.github/workflows/test-package.yml b/.github/workflows/test-package.yml
index 0414e3e..46544f8 100644
--- a/.github/workflows/test-package.yml
+++ b/.github/workflows/test-package.yml
@@ -17,10 +17,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.9
+      - name: Set up Python
         uses: actions/setup-python@v5
         with:
-            python-version: "3.9"
+            python-version: "3.10"
       - name: Install dependencies
         run: python -m pip install .[qa]
       - name: Linting by ruff
@@ -33,7 +33,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.9, '3.10', '3.11', '3.12']
+        python-version: ['3.10', '3.11', '3.12']
         spark-version: [3.2.4, 3.3.4, 3.4.2, 3.5.1]
         pandas-version: [2.2.3, 1.5.3]
         numpy-version: [2.1.2, 1.26.4]
@@ -42,8 +42,6 @@ jobs:
             spark-version: 3.2.4
           - python-version: '3.11'
             spark-version: 3.3.4
-          - python-version: 3.9
-            numpy-version: 2.1.2
           - pandas-version: 1.5.3
             numpy-version: 2.1.2
     env:
@@ -77,7 +75,7 @@ jobs:
       run: |
         python -m pip install .[dev_no_snowflake]
 
-    - name: Install Datacompy with all dev dependencies if Python 3.9, 3.10, or 3.11
+    - name: Install Datacompy with all dev dependencies if Python 3.10, or 3.11
       if: ${{ matrix.python-version != '3.12' }}
       run: |
         python -m pip install .[dev]
@@ -92,7 +90,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.9, '3.10', '3.11', '3.12']
+        python-version: ['3.10', '3.11', '3.12']
 
     env:
       PYTHON_VERSION: ${{ matrix.python-version }}
@@ -119,7 +117,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.9, '3.10', '3.11']
+        python-version: ['3.10', '3.11']
     env:
       PYTHON_VERSION: ${{ matrix.python-version }}
 
diff --git a/README.md b/README.md
index 7c74f3c..7ac5f43 100644
--- a/README.md
+++ b/README.md
@@ -69,7 +69,6 @@ with the Pandas on Spark implementation. Spark plans to support Pandas 2 in [Spa
 
 |             | Spark 3.2.4 | Spark 3.3.4 | Spark 3.4.2 | Spark 3.5.1 |
 |-------------|-------------|-------------|-------------|-------------|
-| Python 3.9  | ✅           | ✅           | ✅           | ✅           |
 | Python 3.10 | ✅           | ✅           | ✅           | ✅           |
 | Python 3.11 | ❌           | ❌           | ✅           | ✅           |
 | Python 3.12 | ❌           | ❌           | ❌           | ❌           |
diff --git a/docs/source/install.rst b/docs/source/install.rst
index 5fdf1bb..9176c32 100644
--- a/docs/source/install.rst
+++ b/docs/source/install.rst
@@ -23,7 +23,7 @@ conda (installs dependencies from Conda Forge)
 
 ::
 
-    conda create --name datacompy python=3.9 pip conda
+    conda create --name datacompy python=3.10 pip conda
     source activate datacompy
     conda config --add channels conda-forge
     conda install datacompy
diff --git a/pyproject.toml b/pyproject.toml
index b0cb8fa..51895cd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ maintainers = [
 ]
 license = {text = "Apache Software License"}
 dependencies = ["pandas<=2.2.3,>=0.25.0", "numpy<=2.2.0,>=1.22.0", "ordered-set<=4.1.0,>=4.0.2", "polars[pandas]<=1.17.1,>=0.20.4"]
-requires-python = ">=3.9.0"
+requires-python = ">=3.10.0"
 classifiers = [
     "Intended Audience :: Developers",
     "Natural Language :: English",
@@ -20,7 +20,6 @@ classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -71,7 +70,7 @@ dev = ["datacompy[fugue]", "datacompy[spark]", "datacompy[snowflake]", "datacomp
 # Linters, formatters and type checkers
 [tool.ruff]
 extend-include = ["*.ipynb"]
-target-version = "py39"
+target-version = "py310"
 src = ["src"]
 
 [tool.ruff.lint]
diff --git a/whitesource.config b/whitesource.config
index 9214410..bae8aa2 100644
--- a/whitesource.config
+++ b/whitesource.config
@@ -4,5 +4,5 @@ python.ignorePipInstallErrors=true
 python.ignoreSourceFiles=true
 python.resolveHierarchyTree=true
 python.resolveSetupPyFiles=true
-python.path=python3.9
-python.pipPath=pip3.9
+python.path=python3.10
+python.pipPath=pip3.10