diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index e5ff45b..7de8874 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -26,8 +26,8 @@ jobs:
       uses: actions/checkout@v4
     - name: Build
       run: |
-        # Public runners come with 2 CPUs.
-        make -j2
+        # Public runners come with 4 CPUs.
+        make -j4
     - name: Create testbuild package
       run: |
         # Create release directory tree
diff --git a/.github/workflows/win32.yml b/.github/workflows/win32.yml
index d14194d..92137c0 100644
--- a/.github/workflows/win32.yml
+++ b/.github/workflows/win32.yml
@@ -36,8 +36,8 @@ jobs:
     - name: Build
       shell: msys2 {0}
       run: |
-        # Public runners come with 2 CPUs.
-        make -j2
+        # Public runners come with 4 CPUs.
+        make -j4
     - name: Create testbuild package
       shell: msys2 {0}
       run: |