--- a/Dockerfile-parachain
+++ b/Dockerfile-parachain
@@ -90,7 +90,7 @@
       nvm install v15.5.0 && \
       nvm use v15.5.0
 
-RUN git clone https://github.com/paritytech/polkadot-launch.git
+RUN git clone https://github.com/PureStake/polkadot-launch -b jlm-use-para-id-in-specs
 
 RUN export NVM_DIR="$HOME/.nvm" && \
     [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" && \