diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index e22b208..83b2094 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -19,31 +19,29 @@ concurrency:
 jobs:
   # The CI test job
   test:
-    name: ${{ matrix.gap-branch }}
+    name: ${{ matrix.gap-version }}
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        gap-branch:
-          - master
-          - stable-4.15
-          - stable-4.14
-          - stable-4.13
-          - stable-4.12
+        gap-version:
+          - 'devel'
+          - '4.15'
+          - '4.14'
+          - '4.13'
+          - '4.12'
 
     steps:
       - uses: actions/checkout@v6
-      - uses: gap-actions/setup-gap@v2
+      - uses: gap-actions/setup-gap@v3
         with:
-          GAPBRANCH: ${{ matrix.gap-branch }}
-      - name: 'Install additional dependencies'
-        run: sudo apt-get install libmpfr-dev libmpfi-dev libmpc-dev
-      - uses: gap-actions/build-pkg@v1
-      - uses: gap-actions/run-pkg-tests@v3
-      - uses: gap-actions/run-pkg-tests@v3
+          gap-version: ${{ matrix.gap-version }}
+      - uses: gap-actions/build-pkg@v3
+      - uses: gap-actions/run-pkg-tests@v4
+      - uses: gap-actions/run-pkg-tests@v4
         with:
-          only-needed: true
-      - uses: gap-actions/process-coverage@v2
+          mode: onlyneeded
+      - uses: gap-actions/process-coverage@v3
       - uses: codecov/codecov-action@v6
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/PackageInfo.g b/PackageInfo.g
index 84d8e68..46f5058 100644
--- a/PackageInfo.g
+++ b/PackageInfo.g
@@ -62,6 +62,10 @@ Dependencies := rec(
   GAP := ">=4.12.0",
   NeededOtherPackages := [["GAPDoc",">=1.0"]],
   SuggestedOtherPackages := [],
+  NeededSystemPackages := rec(
+    Ubuntu   := [["libmpc-dev"], ["libmpfi-dev"], ["libmpfr-dev"]],
+    Homebrew := [["libmpc"],     ["mpfi"],        ["mpfr"]],
+  ),
   ExternalConditions := ["GAP compiled with GMP support"]                      
 ),