diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 5048bc238..4f5aaee30 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
-        python-version: [ "3.11", "3.12", "3.13", "3.14" ]
+        python-version: [ "3.12", "3.13", "3.14" ]
     defaults:
       run:
         shell: bash -l {0}
diff --git a/.github/workflows/codegen.yml b/.github/workflows/codegen.yml
index 59f2e15ea..30e7fa1c4 100644
--- a/.github/workflows/codegen.yml
+++ b/.github/workflows/codegen.yml
@@ -13,7 +13,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
-        python-version: [ "3.11", "3.11", "3.12", "3.13", "3.14" ]
+        python-version: [ "3.12", "3.13", "3.14" ]
         ref: ["develop", "master", "6.4.1", "6.4.0"]
     defaults:
       run:
diff --git a/.github/workflows/commit.yml b/.github/workflows/commit.yml
index 3db764b93..60ade0e4f 100644
--- a/.github/workflows/commit.yml
+++ b/.github/workflows/commit.yml
@@ -71,7 +71,7 @@ jobs:
         shell: bash
     timeout-minutes: 10
     env:
-      PYTHON_VERSION: '3.11'
+      PYTHON_VERSION: '3.12'
 
     steps:
       - name: Checkout repo
@@ -115,7 +115,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
-        python-version: [ "3.11", "3.12", "3.13", "3.14" ]
+        python-version: [ "3.12", "3.13", "3.14" ]
     defaults:
       run:
         shell: bash -l {0}
diff --git a/.github/workflows/examples.yml b/.github/workflows/examples.yml
index 6f8f1afcc..ba2896f63 100644
--- a/.github/workflows/examples.yml
+++ b/.github/workflows/examples.yml
@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
-        python-version: [ "3.11", "3.12", "3.13", "3.14" ]
+        python-version: [ "3.12", "3.13", "3.14" ]
     defaults:
       run:
         shell: bash
diff --git a/.github/workflows/optional.yml b/.github/workflows/optional.yml
index 4e1b18b3c..ddea5a0bc 100644
--- a/.github/workflows/optional.yml
+++ b/.github/workflows/optional.yml
@@ -15,7 +15,7 @@ jobs:
         shell: bash
     timeout-minutes: 10
     env:
-      PYTHON_VERSION: '3.11'
+      PYTHON_VERSION: '3.12'
     strategy:
       fail-fast: false
       matrix:
diff --git a/.readthedocs.yml b/.readthedocs.yml
index 43dde5ed0..a79cf0372 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -9,7 +9,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.11"
+    python: "3.12"
   # todo: uncomment below if notebooks are to be executed in RTD build
   # instead of in CI as currently, requires runtime reduction <15 mins
   # jobs:
diff --git a/DEVELOPER.md b/DEVELOPER.md
index 9399fcf0a..855675d7b 100644
--- a/DEVELOPER.md
+++ b/DEVELOPER.md
@@ -60,9 +60,9 @@ git config blame.ignoreRevsFile .git-blame-ignore-revs
 
 ### Python
 
-This project has historically aimed to support a wide range of [Python versions](https://devguide.python.org/versions/). In current and future development this window may narrow to follow [SPEC 0](https://scientific-python.org/specs/spec-0000/#support-window) instead.
+This project has historically aimed to support a wide range of [Python versions](https://devguide.python.org/versions/). Development now follows the [SPEC 0](https://scientific-python.org/specs/spec-0000/#support-window) support window instead.
 
-Install Python >=3.11 via [standalone download](https://www.python.org/downloads/), [uv](https://docs.astral.sh/uv/), or a conda-like distribution like [Anaconda](https://www.anaconda.com/products/individual), [miniconda](https://docs.conda.io/en/latest/miniconda.html) or [miniforge](https://github.com/conda-forge/miniforge) .
+Install Python >=3.12 via [standalone download](https://www.python.org/downloads/), [uv](https://docs.astral.sh/uv/), or a conda-like distribution like [Anaconda](https://www.anaconda.com/products/individual), [miniconda](https://docs.conda.io/en/latest/miniconda.html) or [miniforge](https://github.com/conda-forge/miniforge) .
 
 Then install FloPy and core dependencies from the project root path:
 
diff --git a/README.md b/README.md
index 3768a4a19..600d44a50 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ Documentation
 Installation
 -----------------------------------------------
 
-FloPy requires **Python** 3.11+ with:
+FloPy requires **Python** 3.12+ with:
 
 ```
 numpy >=1.20.3
diff --git a/etc/environment.yml b/etc/environment.yml
index 36284adfc..00771c586 100644
--- a/etc/environment.yml
+++ b/etc/environment.yml
@@ -6,7 +6,7 @@ dependencies:
   - pip
 
   # required
-  - python>=3.11
+  - python>=3.12
   - numpy>=1.20.3
   - matplotlib>=1.4.0
   - pandas>=2.0.0,<3
diff --git a/pyproject.toml b/pyproject.toml
index 481623182..9e3dfd096 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,13 +18,12 @@ classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Science/Research",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: 3.14",
     "Topic :: Scientific/Engineering :: Hydrology",
 ]
-requires-python = ">=3.11"
+requires-python = ">=3.12"
 dependencies = [
     "numpy>=1.20.3,<3.0",
     "matplotlib >=1.4.0",