diff --git a/Makefile b/Makefile
index 71027a4..d41005b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,8 @@
-all:
+all: build
+
+build:
 	python bundle.py > cic.json
 
 
-test: all
+test: build
 	check-jsonschema --schemafile cic.json test_valid.json
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..fee269a
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+check-jsonschema==0.21.0