diff --git a/Dockerfile b/Dockerfile
index a649ad8..34d9e30 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,14 +15,14 @@ RUN apk update && \
 
 # Raspberry Pi Pico SDK
 ARG SDK_PATH=/usr/share/pico_sdk
-RUN git clone https://github.com/raspberrypi/pico-sdk $SDK_PATH && \
+RUN git clone --depth 1 --branch 1.4.0 https://github.com/raspberrypi/pico-sdk $SDK_PATH && \
     cd $SDK_PATH && \
     git submodule update --init
 
 ENV PICO_SDK_PATH=$SDK_PATH
 
 # Picotool installation
-RUN git clone -b master https://github.com/raspberrypi/picotool.git /home/picotool && \
+RUN git clone --depth 1 --branch 1.1.0 https://github.com/raspberrypi/picotool.git /home/picotool && \
     cd /home/picotool && \
     mkdir build && \
     cd build && \
diff --git a/test_sdk.sh b/test_sdk.sh
index 061bff0..96019e8 100644
--- a/test_sdk.sh
+++ b/test_sdk.sh
@@ -1,4 +1,4 @@
-docker build . --tag pico-sdk
+docker build . --tag lukstep/raspberry-pi-pico-sdk:latest
 docker run -d -it --name pico-sdk --mount type=bind,source=${PWD}/test_poject,target=/home/dev pico-sdk
 docker exec pico-sdk /bin/sh -c "cd /home/dev && mkdir build && cd build && cmake .. && make -j4"
 docker exec pico-sdk /bin/sh -c "picotool"