diff --git a/images/rules-as-code/Dockerfile b/images/rules-as-code/Dockerfile
index 60c4b60..6965a94 100644
--- a/images/rules-as-code/Dockerfile
+++ b/images/rules-as-code/Dockerfile
@@ -3,8 +3,10 @@ FROM uselagoon/python-3.11:latest
 ENV COUNTRY_TEMPLATE_VERSION=6.0.1
 ENV OPENFISCA_CORE_VERSION=41.4.2
 ENV COUNTRY_NAME=rules
+# tells the local development environment on which port we are running
+ENV LAGOON_LOCALDEV_HTTP_PORT=8800
 
-EXPOSE 3000
+EXPOSE 8800
 WORKDIR /app
 
 # Install OpenFisca-Core dependencies
@@ -23,4 +25,4 @@ RUN tar -xzf /app/$COUNTRY_TEMPLATE_VERSION.tar.gz -C /app && \
 COPY bootstrap.sh /app
 RUN . /app/bootstrap.sh
 
-CMD ["openfisca", "serve", "--bind", "0.0.0.0:3000"]
+CMD ["openfisca", "serve", "--bind", "0.0.0.0:8800"]