diff --git a/Makefile b/Makefile
index 0ff3545..189c3c6 100644
--- a/Makefile
+++ b/Makefile
@@ -70,7 +70,7 @@ vugu: clean
 
 .PHONY: vecty
 vecty: clean
-	GOOS=js GOARCH=wasm go build -o ./html/test.wasm ./vecty/main.go
+	GO111MODULE=on GOOS=js GOARCH=wasm go build -o ./html/test.wasm ./vecty/main.go
 	cp ./vecty/index.html ./html/index.html
 	cp $$(go env GOROOT)/misc/wasm/wasm_exec.js ./html/wasm_exec.js
 
diff --git a/go.mod b/go.mod
index 117e9a3..695e3fd 100644
--- a/go.mod
+++ b/go.mod
@@ -5,11 +5,12 @@ go 1.12
 require (
 	github.com/NYTimes/gziphandler v1.1.1
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0
-	github.com/gopherjs/vecty v0.0.0-20190701174234-2b6fc20f8913 // indirect
+	github.com/gopherjs/vecty v0.0.0-20190701174234-2b6fc20f8913
 	github.com/hajimehoshi/ebiten v1.9.3
-	github.com/microcosm-cc/bluemonday v1.0.2 // indirect
+	github.com/microcosm-cc/bluemonday v1.0.2
 	github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
-	github.com/slimsag/blackfriday v2.0.0+incompatible // indirect
+	github.com/slimsag/blackfriday v2.0.0+incompatible
 	github.com/vugu/vugu v0.0.0-20190518235128-5a84f26390d1
 	golang.org/x/image v0.0.0-20190618124811-92942e4437e2
+	golang.org/x/sys v0.0.0-20190621203818-d432491b9138 // indirect
 )
diff --git a/go.sum b/go.sum
index 937be79..a8141bf 100644
--- a/go.sum
+++ b/go.sum
@@ -74,6 +74,7 @@ golang.org/x/sys v0.0.0-20181228144115-9a3f9b0469bb/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190203050204-7ae0202eb74c/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190621203818-d432491b9138/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/tools v0.0.0-20190202235157-7414d4c1f71c/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190407030857-0fdf0c73855b/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=