diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8de0d69c..7d5f846d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -106,16 +106,16 @@ jobs:
   broad-tests:
     needs: format-and-types
     strategy:
-      fail-fast: true
+      fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
         os: [ubuntu-latest, windows-latest]
         exclude:
           - os: windows-latest
             python-version: "3.10"
           - os: windows-latest
             python-version: "3.11"
-          - os: ubuntu-latest
+          - os: windows-latest
             python-version: "3.12"
 
     runs-on: ${{ matrix.os }}
@@ -152,7 +152,8 @@ jobs:
         if: runner.os == 'Linux'
         run: |
           sudo apt-get update
-          sudo apt-get -y install python3-louis librsvg2-bin libcairo2-dev
+          sudo apt-get -y install \
+          gcc pkg-config python3-dev build-essential python3-louis librsvg2-bin libcairo2-dev
 
       - name: Install dependencies
         shell: bash
@@ -189,7 +190,7 @@ jobs:
       with:
         name: ${{ inputs.source-artifact }}
         path: .
-    - uses: awalsh128/cache-apt-pkgs-action@v1.4.3
+    - uses: awalsh128/cache-apt-pkgs-action@latest
       with:
         packages: jing trang
         version: 1.0
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0531821e..42f4d00b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,16 @@ Instructions: Add a subsection under `[Unreleased]` for additions, fixes, change
 
 ## [Unreleased]
 
+### Changed
+
+- PreTeXt now uses MathJax 4 for rendering math in HTML output.
+
+### Fixed
+
+- Handouts and worksheets avoid a blank page at the end of a document in Chrome on Windows.
+- Permalinks are no longer selected when copying blocks of text.
+- "list-of" improvements (avoiding conflicts with prefigure names).
+
 ## [2.38.3] - 2026-04-21
 
 Includes updates to core through commit: [f22ebc5](https://github.com/PreTeXtBook/pretext/commit/f22ebc5d4ac96835c69e141ce89bd313c33210a2)
diff --git a/poetry.lock b/poetry.lock
index d90a6946..979be77d 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2025,15 +2025,15 @@ reference = "pypi-public"
 
 [[package]]
 name = "prefig"
-version = "0.5.14"
+version = "0.5.15"
 description = "An authoring system for mathematical diagrams"
 optional = true
 python-versions = ">=3.10,<4.0"
 groups = ["main"]
 markers = "extra == \"prefigure\" or extra == \"all\""
 files = [
-    {file = "prefig-0.5.14-py3-none-any.whl", hash = "sha256:4825f341480a5b18db9775d0fa997be5d589e69c3a7eb4a3bf0c316de136f3ec"},
-    {file = "prefig-0.5.14.tar.gz", hash = "sha256:40324fc2370fcade40d12b1361037e7da3cf79666905f6142ae33757a635105f"},
+    {file = "prefig-0.5.15-py3-none-any.whl", hash = "sha256:3857f133a2e41c5b8918eb5c34c114f7339891ec8fad5654fd6ef4aa35028a12"},
+    {file = "prefig-0.5.15.tar.gz", hash = "sha256:e54722774acae1814f749a6872685377d48b9df85cda7ad492d39cd4535a66bb"},
 ]
 
 [package.dependencies]
diff --git a/pretext/__init__.py b/pretext/__init__.py
index 938db3a9..b7fa05a9 100644
--- a/pretext/__init__.py
+++ b/pretext/__init__.py
@@ -19,7 +19,7 @@
 VERSION = get_version("pretext", Path(__file__).parent.parent)
 
 
-CORE_COMMIT = "f22ebc5d4ac96835c69e141ce89bd313c33210a2"
+CORE_COMMIT = "b16942370f7710784c73c28349c62d4f368b3825"
 
 
 def activate() -> None: