diff --git a/GNUmakefile b/GNUmakefile
index 27471ea68..9cd8f80d9 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -7,7 +7,8 @@ EXTERNAL_TOOLS=\
 	golang.org/x/tools/cmd/cover \
 	github.com/axw/gocov/gocov \
 	gopkg.in/matm/v1/gocov-html \
-	github.com/ugorji/go/codec/codecgen
+	github.com/ugorji/go/codec/codecgen \
+	github.com/hashicorp/vault
 
 GOFILES_NOVENDOR = $(shell find . -type f -name '*.go' -not -path "./vendor/*")