diff --git a/Makefile b/Makefile
index 88afbfe1..915778f6 100644
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,7 @@ BENCH=src/examples/bench.go
 
 install:
 	@go get github.com/go-sql-driver/mysql
+	@go get github.com/go-cas/cas
 	@go get github.com/nsf/termbox-go
 	@go get github.com/skip2/go-qrcode
 	@go get github.com/gomarkdown/markdown