diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f2f5836..ef0779d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,34 +5,43 @@ jobs:
   weasyprint-build:
     name: Build WeasyPrint
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        version: ["3.12", "3.13"]
+    env:
+      RUNTIME: ${{ matrix.version }}
     steps:
       - uses: actions/checkout@v4
       - name: Build Layer 
-        run: make build/weasyprint-layer-python3.12.zip
+        run: make build/weasyprint-layer-python${{ matrix.version }}.zip
       - name: Test weasyprint
         run: |
           mkdir output
           make test.start.container &
           sleep 1
-          TEST_FILENAME=output/report.pdf make test.print.report
+          make test.print.report
           rm -rf build/opt
+        env:
+          TEST_FILENAME: build/test-report-${{ matrix.version }}.pdf 
       - name: Upload Build
         uses: actions/upload-artifact@v4
         with:
-          name: WeasyPrint Layer Build
+          name: WeasyPrint Layer Build ${{ matrix.version }}
           path: build
-      - name: Upload Test PDF
-        uses: actions/upload-artifact@v4
+  weasyprint-release:
+    name: Release WeasyPrint
+    runs-on: ubuntu-latest
+    needs: [weasyprint-build]
+    if: startsWith(github.ref, 'refs/tags/weasyprint-')
+    steps:
+      - name: Download build
+        uses: actions/download-artifact@v4
         with:
-          name: WeasyPrint Test Results
-          path: output
+          path: artifacts
       - name: Create WeasyPrint Release
-        if: startsWith(github.ref, 'refs/tags/weasyprint-')
         uses: softprops/action-gh-release@4634c16e79c963813287e889244c50009e7f0981
         with:
-          files: |
-            ./build/weasyprint-layer-python3.12.zip
-            ./build/weasyprint-layer-python3.12-no-fonts.zip
+          files: ./artifacts/**/weasyprint-layer-python*
 
   ghostscript-build:
     name: Build GhostScript
diff --git a/Makefile b/Makefile
index 29435ee..1704224 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 PLATFORM ?= linux/amd64
 RUNTIME ?= 3.12
 TEST_FILENAME ?= report.pdf
-DOCKER_RUN=docker run --rm --platform=${PLATFORM}
+DOCKER_RUN=docker run --rm --platform=${PLATFORM} -e RUNTIME_VERSION=${RUNTIME}
 
 .PHONY: stack.deploy.weasyprint clean test.start.container test.print.report
 
diff --git a/ghostscript/layer_builder.sh b/ghostscript/layer_builder.sh
index 4ef010e..376548f 100755
--- a/ghostscript/layer_builder.sh
+++ b/ghostscript/layer_builder.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 set -e
-export VERSION="10.03.0"
+export VERSION="10.04.0"
 
 dnf install -y gcc tar
 cd /tmp/
diff --git a/weasyprint/README.md b/weasyprint/README.md
index 0a16360..d17e428 100644
--- a/weasyprint/README.md
+++ b/weasyprint/README.md
@@ -17,6 +17,7 @@ Build layer:
     $ make test.print.report
     # a report.pdf file will generate to the current directory
 
+
 Deploy layer:
 
     $ aws lambda publish-layer-version \
@@ -32,6 +33,11 @@ Lambda must be configured with these env vars:
 
 If you are using the release zip files ensure your Lambda instruction set architecture is set to `x86_64` and not `arm64`.
 
+
+To build a layer for python 3.13 use:
+
+    RUNTIME=3.13 make build/weasyprint-layer-python3.13.zip
+
 ## Docker Lambda
 
 Build layer: