diff --git a/.github/workflows/mingw.yml b/.github/workflows/mingw.yml
index 1c4da02b21..0519f46f54 100644
--- a/.github/workflows/mingw.yml
+++ b/.github/workflows/mingw.yml
@@ -51,6 +51,12 @@ jobs:
         path: baresip-win32/openssl
         key: ${{ runner.os }}-mingw-openssl-3.0.7
 
+    - uses: actions/cache@v4
+      id: libopus
+      with:
+        path: baresip-win32/opus
+        key: ${{ runner.os }}-mingw-opus-1.5.2
+
     - name: "build openssl"
       if: steps.openssl.outputs.cache-hit != 'true'
       run: |
@@ -59,6 +65,14 @@ jobs:
         mv openssl-3.0.7 baresip-win32/openssl
         make -j$(nproc) -C baresip-win32 openssl
 
+    - name: "build opus"
+      if: steps.opus.outputs.cache-hit != 'true'
+      run: |
+        wget https://downloads.xiph.org/releases/opus/opus-1.5.2.tar.gz
+        tar -xzf opus-1.5.2.tar.gz
+        mv opus-1.5.2 baresip-win32/opus
+        make -j$(nproc) -C baresip-win32 opus
+
     - name: "build"
       run: make -j$(nproc) -C baresip-win32 baresip