diff --git a/Makefile b/Makefile
index 280b0dc..fd151ac 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,7 @@
 .PHONY: default clean checks test build
 
+export GO111MODULE=on
+
 TAG_NAME := $(shell git tag -l --contains HEAD)
 SHA := $(shell git rev-parse --short HEAD)
 VERSION := $(if $(TAG_NAME),$(TAG_NAME),$(SHA))
diff --git a/go.mod b/go.mod
index 47dfa4d..a0aa50b 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/abronan/valkeyrie v0.0.0-20190802193736-ed4c4a229894
 	github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878 // indirect
 	github.com/fsnotify/fsnotify v1.4.8-0.20190312181446-1485a34d5d57
-	github.com/go-acme/lego/v3 v3.0.1-1
+	github.com/go-acme/lego/v3 v3.0.2
 	github.com/hashicorp/go-msgpack v0.5.5 // indirect
 	github.com/hashicorp/go-uuid v1.0.1 // indirect
 	github.com/hashicorp/memberlist v0.1.4 // indirect
diff --git a/go.sum b/go.sum
index 2e26632..c5d5dc4 100644
--- a/go.sum
+++ b/go.sum
@@ -83,8 +83,8 @@ github.com/fsnotify/fsnotify v1.4.8-0.20190312181446-1485a34d5d57 h1:r+AdyYQnMjC
 github.com/fsnotify/fsnotify v1.4.8-0.20190312181446-1485a34d5d57/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/ghodss/yaml v1.0.0 h1:wQHKEahhL6wmXdzwWG11gIVCkOv05bNOh+Rxn0yngAk=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
-github.com/go-acme/lego/v3 v3.0.1-1 h1:cHLBI1yz4mg2k8Zr6NPskHxqEI8GvLmKPEW9d4qw3vk=
-github.com/go-acme/lego/v3 v3.0.1-1/go.mod h1:sMoLjf8BUo4Jexg+6Xw5KeFx98KVZ7Nfczh9tzLyhJU=
+github.com/go-acme/lego/v3 v3.0.2 h1:cnS+URiPzkt2pd7I2WlZtFyt2ihQ762nouBybY4djjw=
+github.com/go-acme/lego/v3 v3.0.2/go.mod h1:sMoLjf8BUo4Jexg+6Xw5KeFx98KVZ7Nfczh9tzLyhJU=
 github.com/go-errors/errors v1.0.1/go.mod h1:f4zRHt4oKfwPJE5k8C9vpYG+aDHdBFUsgrm6/TyX73Q=
 github.com/go-ini/ini v1.44.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=