diff --git a/Makefile b/Makefile
index 1eef09b..18dd38e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CONVERTER = python3 src/converter.py
 
-build:
+build: src/seo-source.json
 	$(CONVERTER) --inputfile src/seo-source.json --targetformat adguard --outputfile dist/seo-nonsense/adguard.txt
 
 clean: