diff --git a/.github/workflows/local-dev-check.yml b/.github/workflows/local-dev-check.yml
index 079d921..7a3fed3 100644
--- a/.github/workflows/local-dev-check.yml
+++ b/.github/workflows/local-dev-check.yml
@@ -14,4 +14,7 @@ jobs:
       
       - name: check-content
         run: |
+          # download yq
+          curl https://github.com/mikefarah/yq/releases/download/3.3.0/yq_linux_amd64 -o yq --silent
+          chmod +x ./yq
           ./scripts/invalid-docker-ports.sh
diff --git a/README.md b/README.md
index 4d583ab..f7f951c 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,4 @@
 # Welcome to your course 🎉
-boo
 
 ### Getting started
 
diff --git a/local_dev/docker-compose.yml b/local_dev/docker-compose.yml
index d5a7b03..6c4a4e8 100644
--- a/local_dev/docker-compose.yml
+++ b/local_dev/docker-compose.yml
@@ -1,5 +1,6 @@
 # Important: We should avoid exposing any ports between `20000` and `36384`
 # see here for reasons why: https://github.com/logrhythm/boreas/tree/master/documentation/troubleshooting
+## trigger boo
 version: '3.7'
 
 volumes:
diff --git a/scripts/invalid-docker-ports.sh b/scripts/invalid-docker-ports.sh
index 19c3f59..0c2a56c 100755
--- a/scripts/invalid-docker-ports.sh
+++ b/scripts/invalid-docker-ports.sh
@@ -10,8 +10,8 @@ done | sed 's/^"//g' | sed 's/^-//g' | sed '/^$/d' | sed 's/:.*//')
 # check range of ports for restricted range
 for port in `echo ${exposed_ports} | sed 's/ /\n/g'`
 do
-  #if [ ${port} >= 20000 && ${port} <= 36384 ]; then
   #if (( ${port} >= 20000 && ${port} <= 36384 )); then
+  # make it fail:
   if (( ${port} >= 20000 && ${port} <= 41333 )); then
     echo "${port} is in a restricted range for Hyper-V"
     exit 1