diff --git a/.github/actions/cleanup-android/action.yaml b/.github/actions/cleanup-android/action.yaml
new file mode 100644
index 0000000..0abab82
--- /dev/null
+++ b/.github/actions/cleanup-android/action.yaml
@@ -0,0 +1,12 @@
+name: "Clean up android sdk/ndk"
+description: "Removes Android SDK/NDK to free up disk space on the runner."
+
+runs:
+  using: "composite"
+  steps:
+    - name: Remove android toolchain
+      shell: bash
+      run: |
+        echo "Removing android toolchain to free up disk space..."
+        sudo rm -rf /usr/local/lib/android
+        df -h
diff --git a/.github/actions/cleanup-space/action.yaml b/.github/actions/cleanup-space/action.yaml
new file mode 100644
index 0000000..cd44fd1
--- /dev/null
+++ b/.github/actions/cleanup-space/action.yaml
@@ -0,0 +1,48 @@
+name: "Clean up runner disk space"
+description: "Removes large, non-essential toolsets to free up disk space on the runner."
+
+runs:
+  using: "composite"
+  steps:
+    - name: Free up disk space
+      shell: bash
+      run: |
+        echo "Removing large toolsets to free up disk space..."
+        echo "Disk space before cleanup:"
+        df -h
+
+        # Remove dotnet to save disk space.
+        sudo rm -rf /usr/share/dotnet
+        # Remove ghc to save disk space.
+        sudo rm -rf /opt/ghc
+        # Remove large packages.
+        sudo rm -rf /usr/share/swift
+        sudo rm -rf /usr/local/julia*
+        sudo rm -rf /opt/hostedtoolcache
+
+        # Remove docker images to save space.
+        docker image prune -a -f || true
+
+        # Remove large apt packages.
+        sudo apt-get remove -y \
+            '^aspnetcore-.*' \
+            '^dotnet-.*' \
+            '^llvm-.*' \
+            'php.*' \
+            '^mongodb-.*' \
+            '^mysql-.*' \
+            azure-cli \
+            google-chrome-stable \
+            firefox \
+            powershell \
+            mono-devel \
+            libgl1-mesa-dri 2>/dev/null || true
+        sudo apt-get autoremove -y
+        sudo apt-get clean
+
+        # Remove caches.
+        sudo rm -rf /usr/local/share/boost
+        sudo rm -rf "$AGENT_TOOLSDIRECTORY"
+
+        echo "Disk space after cleanup:"
+        df -h
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a833af7..151e68b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -27,7 +27,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: git checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v5
+
+      - name: Clean up runner space
+        uses: ./.github/actions/cleanup-space
 
       - name: go cache
         uses: actions/cache@v3
@@ -60,6 +63,9 @@ jobs:
       - name: wasm compile
         run: make wasm
 
+      - name: Clean up runner space (android)
+        uses: ./.github/actions/cleanup-android
+
   ########################
   # lint code
   ########################
@@ -68,10 +74,16 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: git checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
+      - name: Clean up runner space
+        uses: ./.github/actions/cleanup-space
+
+      - name: Clean up runner space (android)
+        uses: ./.github/actions/cleanup-android
+
       - name: go cache
         uses: actions/cache@v3
         with:
@@ -106,7 +118,13 @@ jobs:
           - unit-race
     steps:
       - name: git checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v5
+
+      - name: Clean up runner space
+        uses: ./.github/actions/cleanup-space
+
+      - name: Clean up runner space (android)
+        uses: ./.github/actions/cleanup-android
 
       - name: go cache
         uses: actions/cache@v3
@@ -135,7 +153,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: git checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v5
+
+      - name: Clean up runner space
+        uses: ./.github/actions/cleanup-space
+
+      - name: Clean up runner space (android)
+        uses: ./.github/actions/cleanup-android
 
       - name: go cache
         uses: actions/cache@v3