diff --git a/Makefile b/Makefile
index 74fcc02..79ea48b 100644
--- a/Makefile
+++ b/Makefile
@@ -140,7 +140,7 @@
 clean:
 	rm -rf $(BUILD_DIR) $(TARGET_DIR)
 
-$(TARGET_DIR)/dnb.index: $(foreach year,$(YEARS),$(TARGET_DIR)/dnb$(year).json)
+$(TARGET_DIR)/dnb.index: $(foreach year,$(YEARS),$(TARGET_DIR)/dnb$(year).krill.tar)
 	rm -rf $@
 	java -jar lib/Krill-Indexer.jar -c lib/krill.conf -i $(subst " ",;,$^) -o $@