diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 1f60066d..56c46731 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,6 +11,8 @@ jobs:
       run: |
           sudo apt-get update
           sudo apt-get install autoconf-archive qemu-system-arm libusb-1.0-0 libusb-1.0-0-dev uuid-dev gcc-arm-none-eabi cmake uuid-runtime python3-dev libmbedtls-dev liblzma-dev uuid-dev
+          wget https://github.com/Mbed-TLS/mbedtls/archive/refs/tags/v3.4.0.zip
+          unzip v3.4.0.zip
     - name: Build BPAK
       run: |
             git clone https://github.com/jonasblixt/bpak --depth 1 --branch v0.9.3
@@ -40,6 +42,7 @@ jobs:
             popd
     - name: Build punchboot and run tests
       run: |
+          export MBEDTLS_DIR=$(readlink -f mbedtls-3.4.0)
           cp configs/test_defconfig .config
           make CROSS_COMPILE=arm-none-eabi- BOARD=src/board/test Q= check
     - name: codecov