diff --git a/go.mod b/go.mod
index 5947f42..ced314c 100644
--- a/go.mod
+++ b/go.mod
@@ -7,4 +7,4 @@ require (
 	github.com/prometheus/client_golang v0.9.2
 )
 
-go 1.13
+go 1.15
diff --git a/vendor/modules.txt b/vendor/modules.txt
index af11c83..4c7209b 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -1,27 +1,31 @@
 # github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973
 github.com/beorn7/perks/quantile
 # github.com/go-logr/glogr v0.1.0
+## explicit
 github.com/go-logr/glogr
 # github.com/go-logr/logr v0.1.0
+## explicit
 github.com/go-logr/logr
 # github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
+## explicit
 github.com/golang/glog
 # github.com/golang/protobuf v1.2.0
 github.com/golang/protobuf/proto
 # github.com/matttproud/golang_protobuf_extensions v1.0.1
 github.com/matttproud/golang_protobuf_extensions/pbutil
 # github.com/prometheus/client_golang v0.9.2
+## explicit
 github.com/prometheus/client_golang/prometheus
-github.com/prometheus/client_golang/prometheus/promhttp
 github.com/prometheus/client_golang/prometheus/internal
+github.com/prometheus/client_golang/prometheus/promhttp
 # github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910
 github.com/prometheus/client_model/go
 # github.com/prometheus/common v0.0.0-20181126121408-4724e9255275
 github.com/prometheus/common/expfmt
-github.com/prometheus/common/model
 github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg
+github.com/prometheus/common/model
 # github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a
 github.com/prometheus/procfs
+github.com/prometheus/procfs/internal/util
 github.com/prometheus/procfs/nfs
 github.com/prometheus/procfs/xfs
-github.com/prometheus/procfs/internal/util