diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 4f4470b..9491dbb 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -42,11 +42,15 @@ jobs:
         rust:
           - version: 1.66.1 # STABLE
             features: miniscript
-          - version: 1.48.0 # MSRV
-            features: miniscript
+#          - version: 1.48.0 # MSRV
+#            features: miniscript
         emulator:
-          - name: trezor
-          - name: ledger
+#          - name: trezor
+#            docker-params: '--network=host'
+#          - name: ledger
+#            docker-params: '--network=host'
+          - name: coldcard
+            docker-params: '-v /tmp:/tmp'
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -70,7 +74,7 @@ jobs:
           cache-from: type=gha
           cache-to: type=gha
       - name: Run simulator image
-        run: docker run --name simulator --network=host hwi/${{ matrix.emulator.name }}_emulator &
+        run: docker run --name simulator ${{ matrix.emulator.docker-params }} hwi/${{ matrix.emulator.name }}_emulator &
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/ci/Dockerfile.coldcard b/ci/Dockerfile.coldcard
new file mode 100644
index 0000000..210a938
--- /dev/null
+++ b/ci/Dockerfile.coldcard
@@ -0,0 +1,33 @@
+# Ubuntu 23.04 uses gcc-12 by default
+# In coldcard, micropython does not build with gcc-13
+FROM ubuntu:23.04
+
+# Install required packages
+RUN apt-get update && apt-get install -y build-essential git python3 python3-pip libudev-dev gcc-arm-none-eabi libffi-dev swig libpcsclite-dev python-is-python3 autoconf libtool python3-venv pkg-config && apt-get clean
+
+# Prepare source code
+RUN git clone --depth 1 --recursive -b 2024-01-18T1507-v6.2.2X https://github.com/Coldcard/firmware.git
+WORKDIR /firmware/external/libngu/libs/bech32
+RUN git apply ../../bech32.patch
+WORKDIR /firmware
+RUN git apply unix/linux_addr.patch && rm -rf .git && sed -i "/git/d" unix/Makefile && sed -i "/git/d" external/libngu/Makefile
+
+# Prepare virtual env
+ENV VIRTUAL_ENV=/opt/venv
+RUN python3 -m venv $VIRTUAL_ENV
+ENV PATH="$VIRTUAL_ENV/bin:$PATH"
+
+# Install dependencies
+RUN pip install -U pip setuptools && pip install -r requirements.txt
+
+# Build the Coldcard simulator
+WORKDIR /firmware/external/micropython/mpy-cross/
+RUN make
+WORKDIR /firmware/unix
+RUN make setup && make ngu-setup && make
+
+# Run simulator
+## for running on developers' machines
+# USER 1000
+VOLUME ["/tmp"]
+CMD ["./headless.py"]