diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1945004293..e4fbb44b21 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,6 +8,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Checkout submodules
+        run: git submodule update --init
       - name: Install dependencies
         run: sudo apt-get update && sudo apt-get install -y
           libasound2-dev
@@ -35,6 +37,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Checkout submodules
+        run: git submodule update --init
       - name: Install dependencies
         run: sudo apt-get update && sudo apt-get install -y
           ffmpeg
@@ -78,6 +82,8 @@ jobs:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Checkout submodules
+        run: git submodule update --init
       - name: Install dependencies
         run: brew install
           nasm
@@ -91,6 +97,8 @@ jobs:
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Checkout submodules
+        run: git submodule update --init
       - name: Configure
         run: cmake -B build
       - name: Build