diff --git a/mantle/go.mod b/mantle/go.mod
index dceeaa623a..7453480bb8 100644
--- a/mantle/go.mod
+++ b/mantle/go.mod
@@ -21,7 +21,7 @@ require (
 	github.com/digitalocean/go-libvirt v0.0.0-20200810224808-b9c702499bf7 // indirect
 	github.com/digitalocean/go-qemu v0.0.0-20200529005954-1b453d036a9c
 	github.com/digitalocean/godo v1.33.0
-	github.com/dimchansky/utfbom v1.1.0 // indirect
+	github.com/dimchansky/utfbom v1.1.1 // indirect
 	github.com/golang/protobuf v1.4.2
 	github.com/gophercloud/gophercloud v0.17.0
 	github.com/gophercloud/utils v0.0.0-20210323225332-7b186010c04f
diff --git a/mantle/go.sum b/mantle/go.sum
index 62c5992e26..ce2a6a87b3 100644
--- a/mantle/go.sum
+++ b/mantle/go.sum
@@ -141,6 +141,8 @@ github.com/digitalocean/godo v1.33.0 h1:JNZ/0v/Wp//UAIh84YWZ/x5neB3V5lKgcCHzyqEr
 github.com/digitalocean/godo v1.33.0/go.mod h1:iJnN9rVu6K5LioLxLimlq0uRI+y/eAQjROUmeU/r0hY=
 github.com/dimchansky/utfbom v1.1.0 h1:FcM3g+nofKgUteL8dm/UpdRXNC9KmADgTpLKsu0TRo4=
 github.com/dimchansky/utfbom v1.1.0/go.mod h1:rO41eb7gLfo8SF1jd9F8HplJm1Fewwi4mQvIirEdv+8=
+github.com/dimchansky/utfbom v1.1.1 h1:vV6w1AhK4VMnhBno/TPVCoK9U/LP0PkLCS9tbxHdi/U=
+github.com/dimchansky/utfbom v1.1.1/go.mod h1:SxdoEBH5qIqFocHMyGOXVAybYJdr71b1Q/j0mACtrfE=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
diff --git a/mantle/vendor/github.com/dimchansky/utfbom/.travis.yml b/mantle/vendor/github.com/dimchansky/utfbom/.travis.yml
index 3512c85190..19312ee35f 100644
--- a/mantle/vendor/github.com/dimchansky/utfbom/.travis.yml
+++ b/mantle/vendor/github.com/dimchansky/utfbom/.travis.yml
@@ -1,17 +1,28 @@
 language: go
+sudo: false
 
 go:
-  - '1.10'
-  - '1.11'
+  - 1.10.x
+  - 1.11.x
+  - 1.12.x  
+  - 1.13.x
+  - 1.14.x
+  - 1.15.x
 
-# sudo=false makes the build run using a container
-sudo: false
+cache:
+  directories:
+    - $HOME/.cache/go-build
+    - $HOME/gopath/pkg/mod
+
+env:
+  global:
+    - GO111MODULE=on
 
 before_install:
   - go get github.com/mattn/goveralls
   - go get golang.org/x/tools/cmd/cover
   - go get golang.org/x/tools/cmd/goimports
-  - go get github.com/golang/lint/golint
+  - go get golang.org/x/lint/golint
 script:
   - gofiles=$(find ./ -name '*.go') && [ -z "$gofiles" ] || unformatted=$(goimports -l $gofiles) && [ -z "$unformatted" ] || (echo >&2 "Go files must be formatted with gofmt. Following files has problem:\n $unformatted" && false)
   - golint ./... # This won't break the build, just show warnings
diff --git a/mantle/vendor/github.com/dimchansky/utfbom/LICENSE b/mantle/vendor/github.com/dimchansky/utfbom/LICENSE
index 8dada3edaf..6279cb87f4 100644
--- a/mantle/vendor/github.com/dimchansky/utfbom/LICENSE
+++ b/mantle/vendor/github.com/dimchansky/utfbom/LICENSE
@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright {yyyy} {name of copyright owner}
+   Copyright (c) 2018-2020, Dmitrij Koniajev (dimchansky@gmail.com)
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
diff --git a/mantle/vendor/github.com/dimchansky/utfbom/go.mod b/mantle/vendor/github.com/dimchansky/utfbom/go.mod
index 4b9ecc6f54..8f8620af3b 100644
--- a/mantle/vendor/github.com/dimchansky/utfbom/go.mod
+++ b/mantle/vendor/github.com/dimchansky/utfbom/go.mod
@@ -1 +1 @@
-module github.com/dimchansky/utfbom
\ No newline at end of file
+module github.com/dimchansky/utfbom
diff --git a/mantle/vendor/modules.txt b/mantle/vendor/modules.txt
index 528bcc8593..cb143c153b 100644
--- a/mantle/vendor/modules.txt
+++ b/mantle/vendor/modules.txt
@@ -211,7 +211,7 @@ github.com/digitalocean/go-libvirt/internal/go-xdr/xdr2
 github.com/digitalocean/go-qemu/qmp
 # github.com/digitalocean/godo v1.33.0
 github.com/digitalocean/godo
-# github.com/dimchansky/utfbom v1.1.0
+# github.com/dimchansky/utfbom v1.1.1
 github.com/dimchansky/utfbom
 # github.com/godbus/dbus/v5 v5.0.3
 github.com/godbus/dbus/v5