diff --git a/.github/workflows/ci_workflows.yml b/.github/workflows/ci_workflows.yml
index f1c38c0a18..9d4e0119a9 100644
--- a/.github/workflows/ci_workflows.yml
+++ b/.github/workflows/ci_workflows.yml
@@ -51,10 +51,10 @@ jobs:
             toxposargs: --remote-data
             allow_failure: false
 
-          - name: OS X - Python 3.9
+          - name: OS X - Python 3.12
             os: macos-latest
-            python: 3.9
-            toxenv: py39-test
+            python: '3.12'
+            toxenv: py312-test
             allow_failure: false
 
           - name: Windows - Python 3.10
diff --git a/.github/workflows/predeps_workflows.yml b/.github/workflows/predeps_workflows.yml
index aa2d1ac785..0a803a4cb5 100644
--- a/.github/workflows/predeps_workflows.yml
+++ b/.github/workflows/predeps_workflows.yml
@@ -32,8 +32,8 @@ jobs:
 
           - name: RC testing on OSX
             os: macos-latest
-            python: 3.9
-            toxenv: py39-test-predeps
+            python: '3.10'
+            toxenv: py310-test-predeps
 
           - name: RC testing on Windows
             os: windows-latest
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 2754de7d8d..e47e0e683c 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -23,7 +23,7 @@ jobs:
 
     - uses: actions/setup-python@v5
       with:
-        python-version: 3.9
+        python-version: '3.10'
 
     - name: Install python-build and twine
       run: python -m pip install build "twine>=3.3"
diff --git a/CHANGES.rst b/CHANGES.rst
index 43f8e9a17b..cf5e968799 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -62,6 +62,8 @@ Specviz2d
 Other Changes and Additions
 ---------------------------
 
+- Bump required Python version to 3.10. [#2757]
+
 - Line menu in Redshift from Centroid section of Line Analysis now shows values in current units. [#2816]
 
 3.9.2 (unreleased)
diff --git a/README.rst b/README.rst
index 3a6ccd47ed..c5d6b4c5fc 100644
--- a/README.rst
+++ b/README.rst
@@ -54,7 +54,7 @@ version conflicts with other packages you may have installed, for example:
 
 .. code-block:: bash
 
-   conda create -n jdaviz-env python=3.9
+   conda create -n jdaviz-env python=3.12
    conda activate jdaviz-env
 
 Installing the released version can be done using pip:
diff --git a/docs/dev/release.rst b/docs/dev/release.rst
index 96372b8952..739b140a39 100644
--- a/docs/dev/release.rst
+++ b/docs/dev/release.rst
@@ -542,7 +542,7 @@ You can create a clean checkout as follows (requires
 
 .. code-block:: bash
 
-     conda create -n testenv python=3.9
+     conda create -n testenv python=3.12
      conda activate testenv
      pip install pytest pytest-astropy pytest-tornasync dist/*.whl
      cd ..
diff --git a/docs/index.rst b/docs/index.rst
index af771a7dbf..79a848f55b 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -76,7 +76,7 @@ contextual information like on-sky views of the spectrograph slit.
 
 .. warning::
 
-   As of ``jdaviz`` version 3.5, python 3.8 is no longer supported. Please use python 3.9 or
+   As of ``jdaviz`` version 3.10, please use Python 3.10 or
    greater to get the latest bug fixes and feature additions for ``jdaviz``.
 
 .. note::
diff --git a/docs/installation.rst b/docs/installation.rst
index c53b8c6d25..14e2894bbe 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -59,7 +59,7 @@ Common Issues
 If you encounter problems while following these installation instructions,
 please consult :ref:`known installation issues <known_issues_installation>`.
 
-Note that ``jdaviz`` requires Python 3.9 or newer. If your ``pip`` corresponds to an older version of
+Note that ``jdaviz`` requires Python 3.10 or newer. If your ``pip`` corresponds to an older version of
 Python, it will raise an error that it cannot find a valid package.
 
 Users occasionally encounter problems running the pure ``pip`` install above. For those
diff --git a/docs/known_bugs.rst b/docs/known_bugs.rst
index 086f959a35..24ff187678 100644
--- a/docs/known_bugs.rst
+++ b/docs/known_bugs.rst
@@ -51,7 +51,7 @@ compatible version:
 
 .. code-block:: bash
 
-    conda create -n jdaviz python=3.8
+    conda create -n jdaviz python=3.12
     conda activate jdaviz
     pip install vispy>=0.6.5
     pip install jdaviz --no-cache-dir
diff --git a/pyproject.toml b/pyproject.toml
index 0c1db31fdf..52bf994860 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "jdaviz"
 description = "Astronomical data analysis development leveraging the Jupyter platform"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 authors = [
     { name = "JDADF Developers", email = "help@stsci.edu" },
 ]
@@ -38,7 +38,6 @@ dependencies = [
     "sidecar>=0.5.2",
     "ipypopout>=0.0.11",
     "astroquery",
-    "y_py<0.5.5;python_version=='3.9'",
 ]
 dynamic = [
     "version",
diff --git a/tox.ini b/tox.ini
index fd12715869..19504ce2ba 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{38,39,310,311,312}-test{,-alldeps,-devdeps,-predeps}{-romandeps}{,-cov}
+    py{310,311,312}-test{,-alldeps,-devdeps,-predeps}{-romandeps}{,-cov}
     linkcheck
     codestyle
     pep517