diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c582cf1..cb7f4b3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,16 +7,16 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: [ 8.0, 8.1, 8.2 ]
+        php: [ 8.1, 8.2, 8.3 ]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Cache Composer dependencies
         uses: actions/cache@v3
         with:
           path: /tmp/composer-cache
-          key: ${{ runner.os }}-${{ hashFiles('**/composer.lock') }}
+          key: ${{ runner.os }}-${{ matrix.php }}-${{ hashFiles('**/composer.lock') }}
 
       - name: Composer install
         uses: php-actions/composer@v6
@@ -27,9 +27,9 @@ jobs:
         run: mkdir /tmp/github-actions/ && tar -cvf /tmp/github-actions/build.tar ./
 
       - name: Upload build archive for test runners
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
-          name: build-artifact
+          name: build-artifact-${{ matrix.php }}
           path: /tmp/github-actions
 
   phpunit:
@@ -37,15 +37,15 @@ jobs:
     needs: [ composer ]
     strategy:
       matrix:
-        php: [ 8.0, 8.1, 8.2 ]
+        php: [ 8.1, 8.2, 8.3 ]
 
     outputs:
       coverage: ${{ steps.store-coverage.outputs.coverage_text }}
 
     steps:
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
-          name: build-artifact
+          name: build-artifact-${{ matrix.php }}
           path: /tmp/github-actions
 
       - name: Extract build archive
@@ -56,46 +56,50 @@ jobs:
         env:
           XDEBUG_MODE: cover
         with:
+          version: 10
           php_version: ${{ matrix.php }}
           php_extensions: xdebug
           coverage_text: _coverage/coverage.txt
           coverage_clover: _coverage/clover.xml
 
       - name: Store coverage data
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
-          name: code-coverage
+          name: code-coverage-${{ matrix.php }}-${{ github.run_number }}
           path: _coverage
 
   coverage:
     runs-on: ubuntu-latest
     needs: [ phpunit ]
+    strategy:
+      matrix:
+        php: [ 8.1, 8.2, 8.3 ]
 
     steps:
-      - uses: actions/checkout@v3
-
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
-          name: code-coverage
+          name: code-coverage-${{ matrix.php }}-${{ github.run_number }}
           path: _coverage
 
       - name: Output coverage
         run: cat "_coverage/coverage.txt"
 
       - name: Upload to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
 
   phpstan:
     runs-on: ubuntu-latest
     needs: [ composer ]
     strategy:
       matrix:
-        php: [ 8.0, 8.1, 8.2 ]
+        php: [ 8.1, 8.2, 8.3 ]
 
     steps:
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
-          name: build-artifact
+          name: build-artifact-${{ matrix.php }}
           path: /tmp/github-actions
 
       - name: Extract build archive
@@ -106,18 +110,19 @@ jobs:
         with:
           php_version: ${{ matrix.php }}
           path: src/
+          level: 6
 
   phpmd:
     runs-on: ubuntu-latest
     needs: [ composer ]
     strategy:
       matrix:
-        php: [ 8.0, 8.1, 8.2 ]
+        php: [ 8.1, 8.2, 8.3 ]
 
     steps:
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
-          name: build-artifact
+          name: build-artifact-${{ matrix.php }}
           path: /tmp/github-actions
 
       - name: Extract build archive
@@ -136,12 +141,12 @@ jobs:
     needs: [ composer ]
     strategy:
       matrix:
-        php: [ 8.0, 8.1, 8.2 ]
+        php: [ 8.1, 8.2, 8.3 ]
 
     steps:
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
-          name: build-artifact
+          name: build-artifact-${{ matrix.php }}
           path: /tmp/github-actions
 
       - name: Extract build archive
@@ -153,18 +158,3 @@ jobs:
           php_version: ${{ matrix.php }}
           path: src/
           standard: phpcs.xml
-
-  remove_old_artifacts:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Remove old artifacts for prior workflow runs on this repository
-        env:
-          GH_TOKEN: ${{ github.token }}
-        run: |
-          gh api "/repos/${{ github.repository }}/actions/artifacts?name=build-artifact" | jq ".artifacts[] | select(.name == \"build-artifact\") | .id" > artifact-id-list.txt
-          while read id
-          do
-            echo -n "Deleting artifact ID $id ... "
-            gh api --method DELETE /repos/${{ github.repository }}/actions/artifacts/$id && echo "Done"
-          done <artifact-id-list.txt