diff --git a/README.md b/README.md
index 70acb44..3275c14 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
 # Blokmap
 Een handige map met alle bloklocaties in Gent.
 
+This package uses [demjson](https://deron.meranda.us/python/demjson/download) to check the validity of the json file.
+
diff --git a/deploy.sh b/deploy.sh
index b784797..f498366 100755
--- a/deploy.sh
+++ b/deploy.sh
@@ -13,7 +13,7 @@ echo "-> Pulling latest release"
 git pull
 
 echo "-> Checking validity of data.json"
-cat src/data.json | json_verify
+jsonlint src/data.json
 
 
 # Create release dir and copy sources to that dir