diff --git a/Makefile b/Makefile
index 35a4aedaa..272e921ca 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@ all:
 prof:
 	cabal-dev configure --enable-tests --enable-library-profiling --enable-executable-profiling && cabal-dev build
 
-prep: pandoc-types
+prep: pandoc-types citeproc-hs
 	cabal-dev update && \
 	cabal-dev install-deps --enable-library-profiling --enable-tests --enable-benchmarks