diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 1a59f71b2e..bb0a907d9c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -19,8 +19,16 @@ jobs:
       BUNDLE: 'naiveproxy-${{ github.event.release.tag_name }}-${{ github.job }}-${{ matrix.arch }}'
     steps:
       - uses: actions/checkout@v2
+      - uses: actions/cache@v2
+        with:
+          path: ~/.ccache
+          key: ccache-${{ github.job }}-${{ matrix.arch }}-${{ hashFiles('CHROMIUM_VERSION') }}
+      - uses: actions/cache@v2
+        with:
+          path: src/out/sysroot-build/
+          key: sysroot-${{ github.job }}-${{ matrix.arch }}-${{ hashFiles('CHROMIUM_VERSION') }}
       - run: sudo apt update
-      - run: sudo apt install ninja-build pkg-config libnss3-dev qemu-user
+      - run: sudo apt install ninja-build pkg-config libnss3-dev qemu-user ccache
       # libc6-i386 interferes with x86 build
       - run: sudo apt remove libc6-i386
       - run: ./get-clang.sh
@@ -51,6 +59,10 @@ jobs:
       BUNDLE: 'naiveproxy-${{ github.event.release.tag_name }}-${{ github.job }}-${{ matrix.arch }}'
     steps:
       - uses: actions/checkout@v2
+      - uses: actions/cache@v2
+        with:
+          path: '%LOCALAPPDATA%\Mozilla\sccache'
+          key: ccache-${{ github.job }}-${{ matrix.arch }}-${{ hashFiles('CHROMIUM_VERSION') }}
       - run: cinst ninja
       - run: ./get-clang.sh
         working-directory: src
@@ -78,7 +90,11 @@ jobs:
       BUNDLE: 'naiveproxy-${{ github.event.release.tag_name }}-${{ github.job }}-${{ matrix.arch }}'
     steps:
       - uses: actions/checkout@v2
-      - run: brew install ninja
+      - uses: actions/cache@v2
+        with:
+          path: ~/.ccache
+          key: ccache-${{ github.job }}-${{ matrix.arch }}-${{ hashFiles('CHROMIUM_VERSION') }}
+      - run: brew install ninja ccache
       - run: ./get-clang.sh
         working-directory: src
       - run: ./build.sh
@@ -131,8 +147,16 @@ jobs:
       BUNDLE: 'naiveproxy-${{ github.event.release.tag_name }}-${{ github.job }}-${{ matrix.arch }}'
     steps:
       - uses: actions/checkout@v2
+      - uses: actions/cache@v2
+        with:
+          path: ~/.ccache
+          key: ccache-${{ github.job }}-${{ matrix.arch }}-${{ hashFiles('CHROMIUM_VERSION') }}
+      - uses: actions/cache@v2
+        with:
+          path: src/out/sysroot-build/
+          key: openwrt-${{ github.job }}-${{ matrix.arch }}-19.07.7
       - run: sudo apt update
-      - run: sudo apt install ninja-build pkg-config libnss3-dev qemu-user
+      - run: sudo apt install ninja-build pkg-config libnss3-dev qemu-user ccache
       # libc6-i386 interferes with x86 build
       - run: sudo apt remove libc6-i386
       - run: ./get-clang.sh