diff --git a/.copier-answers.yml b/.copier-answers.yml
index e7a8798b..88e04b91 100644
--- a/.copier-answers.yml
+++ b/.copier-answers.yml
@@ -20,7 +20,6 @@ project_license: BSD
 project_name: hats
 project_organization: astronomy-commons
 python_versions:
-- '3.10'
 - '3.11'
 - '3.12'
 - '3.13'
diff --git a/.github/workflows/asv-main.yml b/.github/workflows/asv-main.yml
index 34b3ced7..957e6322 100644
--- a/.github/workflows/asv-main.yml
+++ b/.github/workflows/asv-main.yml
@@ -8,7 +8,7 @@ on:
     branches: [ main ]
 
 env:
-  PYTHON_VERSION: "3.11"
+  PYTHON_VERSION: "3.12"
   ASV_VERSION: "0.6.5"
   WORKING_DIR: ${{github.workspace}}/benchmarks
 
diff --git a/.github/workflows/asv-nightly.yml b/.github/workflows/asv-nightly.yml
index d0dbf4ce..00b89972 100644
--- a/.github/workflows/asv-nightly.yml
+++ b/.github/workflows/asv-nightly.yml
@@ -9,7 +9,7 @@ on:
   workflow_dispatch:
   
 env:
-  PYTHON_VERSION: "3.11"
+  PYTHON_VERSION: "3.12"
   ASV_VERSION: "0.6.5"
   WORKING_DIR: ${{github.workspace}}/benchmarks
   NIGHTLY_HASH_FILE: nightly-hash
diff --git a/.github/workflows/asv-pr.yml b/.github/workflows/asv-pr.yml
index e52157fd..23acf458 100644
--- a/.github/workflows/asv-pr.yml
+++ b/.github/workflows/asv-pr.yml
@@ -15,7 +15,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  PYTHON_VERSION: "3.11"
+  PYTHON_VERSION: "3.12"
   ASV_VERSION: "0.6.5"
   WORKING_DIR: ${{github.workspace}}/benchmarks
   ARTIFACTS_DIR: ${{github.workspace}}/artifacts
diff --git a/.github/workflows/pre-commit-ci.yml b/.github/workflows/pre-commit-ci.yml
index c718066f..a8c85bf6 100644
--- a/.github/workflows/pre-commit-ci.yml
+++ b/.github/workflows/pre-commit-ci.yml
@@ -19,7 +19,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
-        python-version: '3.11'
+        python-version: '3.12'
     - name: Install uv
       uses: astral-sh/setup-uv@v7
     - name: Install dependencies
diff --git a/.github/workflows/publish-to-pypi.yml b/.github/workflows/publish-to-pypi.yml
index 6146a752..7262e296 100644
--- a/.github/workflows/publish-to-pypi.yml
+++ b/.github/workflows/publish-to-pypi.yml
@@ -26,7 +26,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
-        python-version: '3.11'
+        python-version: '3.12'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/.github/workflows/smoke-test.yml b/.github/workflows/smoke-test.yml
index 63c161e8..bfa56170 100644
--- a/.github/workflows/smoke-test.yml
+++ b/.github/workflows/smoke-test.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.11', '3.12', '3.13']
 
     steps:
     - uses: actions/checkout@v5
diff --git a/.github/workflows/testing-and-coverage.yml b/.github/workflows/testing-and-coverage.yml
index 2c18f6a8..72bfde78 100644
--- a/.github/workflows/testing-and-coverage.yml
+++ b/.github/workflows/testing-and-coverage.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.11', '3.12', '3.13']
 
     steps:
     - uses: actions/checkout@v5
@@ -43,10 +43,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v5
-    - name: Set up Python 3.10
+    - name: Set up Python 3.11
       uses: actions/setup-python@v6
       with:
-        python-version: '3.10'
+        python-version: '3.11'
     - name: Install dependencies
       run: |
         sudo apt-get update
diff --git a/.github/workflows/testing-windows.yml b/.github/workflows/testing-windows.yml
index cd949db5..eca42bd8 100644
--- a/.github/workflows/testing-windows.yml
+++ b/.github/workflows/testing-windows.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        python-version: ['3.10']
+        python-version: ['3.11']
 
     steps:
     - uses: actions/checkout@v5
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 9e6a5486..351e9541 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -94,7 +94,7 @@ repos:
         # supported by your project here, or alternatively use
         # pre-commit's default_language_version, see
         # https://pre-commit.com/#top_level-default_language_version
-        language_version: python3.11
+        language_version: python3.12
     # Make sure Sphinx can build the documentation while explicitly omitting 
     # notebooks from the docs, so users don't have to wait through the execution 
     # of each notebook or each commit. By default, these will be checked in the 
diff --git a/.readthedocs.yml b/.readthedocs.yml
index e83928da..578fd870 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -8,7 +8,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.11"
+    python: "3.12"
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
diff --git a/benchmarks/asv.conf.json b/benchmarks/asv.conf.json
index 55ab772f..31572c88 100644
--- a/benchmarks/asv.conf.json
+++ b/benchmarks/asv.conf.json
@@ -37,7 +37,7 @@
     // The Pythons you'd like to test against. If not provided, defaults
     // to the current version of Python used to run `asv`.
     "pythons": [
-        "3.11"
+        "3.12"
     ],
     // The matrix of dependencies to test. Each key is the name of a
     // package (in PyPI) and the values are version numbers.  An empty
diff --git a/pyproject.toml b/pyproject.toml
index 0664cacf..36c2262c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,9 +16,9 @@ classifiers = [
     "Programming Language :: Python",
 ]
 dynamic = ["version"]
-requires-python = ">=3.10"
+requires-python = ">=3.11"
 dependencies = [
-    "aiohttp>=3.8.0", # http filesystem support
+    "aiohttp>=3.10.0", # http filesystem support
     "astropy>=6.1.5",
     "cdshealpix>=0.7.0",
     "fsspec>=2023.10.0", # Used for abstract filesystems
@@ -84,7 +84,7 @@ omit=["src/hats/_version.py"]
 
 [tool.black]
 line-length = 110
-target-version = ["py310"]
+target-version = ["py311"]
 [tool.isort]
 profile = "black"
 line_length = 110
diff --git a/src/.pylintrc b/src/.pylintrc
index ef8deb6d..38327354 100644
--- a/src/.pylintrc
+++ b/src/.pylintrc
@@ -87,7 +87,7 @@ persistent=yes
 
 # Minimum Python version to use for version dependent checks. Will default to
 # the version used to run pylint.
-py-version=3.10
+py-version=3.11
 
 # Discover python modules and packages in the file system subtree.
 recursive=no
diff --git a/tests/.pylintrc b/tests/.pylintrc
index 35a1feb9..16368327 100644
--- a/tests/.pylintrc
+++ b/tests/.pylintrc
@@ -87,7 +87,7 @@ persistent=yes
 
 # Minimum Python version to use for version dependent checks. Will default to
 # the version used to run pylint.
-py-version=3.10
+py-version=3.11
 
 # Discover python modules and packages in the file system subtree.
 recursive=no