diff --git a/build/Dockerfile b/build/Dockerfile
index 09005a21..c669553d 100644
--- a/build/Dockerfile
+++ b/build/Dockerfile
@@ -1,7 +1,7 @@
 FROM golang:1.5.2
 ENV GO15VENDOREXPERIMENT 1
-RUN apt-get update && apt-get install -y libpcap-dev python-requests time
-RUN go get github.com/golang/lint/golint github.com/fzipp/gocyclo
+RUN apt-get update && apt-get install -y libpcap-dev python-requests time file
+RUN go get github.com/golang/lint/golint github.com/fzipp/gocyclo github.com/client9/misspell/cmd/misspell
 RUN go clean -i net && go install -tags netgo std
 RUN go install -race -tags netgo std
 COPY build.sh /
diff --git a/tools b/tools
index c5800d0a..f9aa0816 160000
--- a/tools
+++ b/tools
@@ -1 +1 @@
-Subproject commit c5800d0af1efeeba332b5f22d7286c86ca9db137
+Subproject commit f9aa081666dcf6a8a6c8a3e061fd47a72370595d