diff --git a/go.mod b/go.mod
index 54fb1d4..8e0e802 100644
--- a/go.mod
+++ b/go.mod
@@ -1,11 +1,13 @@
 module github.com/in4it/openvpn-onelogin-auth
 
-go 1.15
+go 1.19
 
 require (
 	github.com/BurntSushi/toml v0.3.1
-	github.com/conformal/yubikey v0.0.0-20140117205816-65ac3de5ed8f // indirect
 	github.com/juju/loggo v0.0.0-20190212223446-d976af380377
+)
+
+require (
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
 )
diff --git a/go.sum b/go.sum
index 53f5b38..897cdd4 100644
--- a/go.sum
+++ b/go.sum
@@ -1,7 +1,5 @@
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/conformal/yubikey v0.0.0-20140117205816-65ac3de5ed8f h1:6arIzlpAngUFbjJmFwqdKXCr0iQZkaiAzpDPprqM3Ss=
-github.com/conformal/yubikey v0.0.0-20140117205816-65ac3de5ed8f/go.mod h1:zVcG9twkhqcPdA/KivDkevbYHZFWN3gAJkHuxqH4OCc=
 github.com/juju/loggo v0.0.0-20190212223446-d976af380377 h1:n6QjW3g5JNY3xPmIjFt6z1H6tFQA6BhwOC2bvTAm1YU=
 github.com/juju/loggo v0.0.0-20190212223446-d976af380377/go.mod h1:vgyd7OREkbtVEN/8IXZe5Ooef3LQePvuBm9UWj6ZL8U=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=