diff --git a/Makefile b/Makefile
index 377c5a2..edada81 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ pdftotext:
 	@find ./data -iname '*.pdf' -execdir pdftotext {} \;
 	@find ./data -not \( -path ./data/text -prune \) -iname '*.txt' -exec mv {} './data/text/' ';'
 
-extract:
+extract: pdftotext
 	@perl extract_urls.pl data/text/*.txt > $$(date +"output/links-%FT%T.txt")
 
 init: