diff --git a/.golangci.yml b/.golangci.yml
index 1627a4d2..a11e549e 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -20,14 +20,6 @@ issues:
       text: "newCipherDESCBCBlock returns interface \\(github\\.com\\/youmark\\/pkcs8\\.Cipher\\)"
       linters:
         - ireturn
-    - path: "internal\\/configuration"
-      text: "printf: non-constant format string in call to \\(\\*github.com\\/qdm12\\/gotree\\.Node\\)\\.Appendf"
-      linters:
-        - govet
-    - path: "internal\\/configuration"
-      text: "non-constant format string in call to github\\.com\\/qdm12\\/gotree\\.New"
-      linters:
-        - govet
 
 linters:
   enable:
diff --git a/go.mod b/go.mod
index 15163717..5c2bdf8f 100644
--- a/go.mod
+++ b/go.mod
@@ -13,7 +13,7 @@ require (
 	github.com/qdm12/gosettings v0.4.2
 	github.com/qdm12/goshutdown v0.3.0
 	github.com/qdm12/gosplash v0.2.0
-	github.com/qdm12/gotree v0.2.0
+	github.com/qdm12/gotree v0.3.0
 	github.com/qdm12/log v0.1.0
 	github.com/qdm12/ss-server v0.6.0
 	github.com/stretchr/testify v1.9.0
diff --git a/go.sum b/go.sum
index 3ff3d714..ec83d072 100644
--- a/go.sum
+++ b/go.sum
@@ -68,8 +68,8 @@ github.com/qdm12/goshutdown v0.3.0 h1:pqBpJkdwlZlfTEx4QHtS8u8CXx6pG0fVo6S1N0MpSE
 github.com/qdm12/goshutdown v0.3.0/go.mod h1:EqZ46No00kCTZ5qzdd3qIzY6ayhMt24QI8Mh8LVQYmM=
 github.com/qdm12/gosplash v0.2.0 h1:DOxCEizbW6ZG+FgpH2oK1atT6bM8MHL9GZ2ywSS4zZY=
 github.com/qdm12/gosplash v0.2.0/go.mod h1:k+1PzhO0th9cpX4q2Nneu4xTsndXqrM/x7NTIYmJ4jo=
-github.com/qdm12/gotree v0.2.0 h1:+58ltxkNLUyHtATFereAcOjBVfY6ETqRex8XK90Fb/c=
-github.com/qdm12/gotree v0.2.0/go.mod h1:1SdFaqKZuI46U1apbXIf25pDMNnrPuYLEqMF/qL4lY4=
+github.com/qdm12/gotree v0.3.0 h1:Q9f4C571EFK7ZEsPkEL2oGZX7I+ZhVxhh1ZSydW+5yI=
+github.com/qdm12/gotree v0.3.0/go.mod h1:iz06uXmRR4Aq9v6tX7mosXStO/yGHxRA1hbyD0UVeYw=
 github.com/qdm12/log v0.1.0 h1:jYBd/xscHYpblzZAd2kjZp2YmuYHjAAfbTViJWxoPTw=
 github.com/qdm12/log v0.1.0/go.mod h1:Vchi5M8uBvHfPNIblN4mjXn/oSbiWguQIbsgF1zdQPI=
 github.com/qdm12/ss-server v0.6.0 h1:OaOdCIBXx0z3DGHPT6Th0v88vGa3MtAS4oRgUsDHGZE=
diff --git a/internal/cli/clientkey.go b/internal/cli/clientkey.go
index e6df02c9..2b428232 100644
--- a/internal/cli/clientkey.go
+++ b/internal/cli/clientkey.go
@@ -27,9 +27,6 @@ func (c *CLI) ClientKey(args []string) error {
 	if err := file.Close(); err != nil {
 		return err
 	}
-	if err != nil {
-		return err
-	}
 	s := string(data)
 	s = strings.ReplaceAll(s, "\n", "")
 	s = strings.ReplaceAll(s, "\r", "")
diff --git a/internal/configuration/settings/dnsblacklist.go b/internal/configuration/settings/dnsblacklist.go
index 05b14716..80e1853a 100644
--- a/internal/configuration/settings/dnsblacklist.go
+++ b/internal/configuration/settings/dnsblacklist.go
@@ -101,30 +101,30 @@ func (b DNSBlacklist) toLinesNode() (node *gotree.Node) {
 	node.Appendf("Block surveillance: %s", gosettings.BoolToYesNo(b.BlockSurveillance))
 
 	if len(b.AllowedHosts) > 0 {
-		allowedHostsNode := node.Appendf("Allowed hosts:")
+		allowedHostsNode := node.Append("Allowed hosts:")
 		for _, host := range b.AllowedHosts {
-			allowedHostsNode.Appendf(host)
+			allowedHostsNode.Append(host)
 		}
 	}
 
 	if len(b.AddBlockedHosts) > 0 {
-		blockedHostsNode := node.Appendf("Blocked hosts:")
+		blockedHostsNode := node.Append("Blocked hosts:")
 		for _, host := range b.AddBlockedHosts {
-			blockedHostsNode.Appendf(host)
+			blockedHostsNode.Append(host)
 		}
 	}
 
 	if len(b.AddBlockedIPs) > 0 {
-		blockedIPsNode := node.Appendf("Blocked IP addresses:")
+		blockedIPsNode := node.Append("Blocked IP addresses:")
 		for _, ip := range b.AddBlockedIPs {
-			blockedIPsNode.Appendf(ip.String())
+			blockedIPsNode.Append(ip.String())
 		}
 	}
 
 	if len(b.AddBlockedIPPrefixes) > 0 {
-		blockedIPPrefixesNode := node.Appendf("Blocked IP networks:")
+		blockedIPPrefixesNode := node.Append("Blocked IP networks:")
 		for _, ipNetwork := range b.AddBlockedIPPrefixes {
-			blockedIPPrefixesNode.Appendf(ipNetwork.String())
+			blockedIPPrefixesNode.Append(ipNetwork.String())
 		}
 	}
 
diff --git a/internal/configuration/settings/dot.go b/internal/configuration/settings/dot.go
index 157bfc3c..3e0feb14 100644
--- a/internal/configuration/settings/dot.go
+++ b/internal/configuration/settings/dot.go
@@ -127,9 +127,9 @@ func (d DoT) toLinesNode() (node *gotree.Node) {
 	}
 	node.Appendf("Update period: %s", update)
 
-	upstreamResolvers := node.Appendf("Upstream resolvers:")
+	upstreamResolvers := node.Append("Upstream resolvers:")
 	for _, provider := range d.Providers {
-		upstreamResolvers.Appendf(provider)
+		upstreamResolvers.Append(provider)
 	}
 
 	node.Appendf("Caching: %s", gosettings.BoolToYesNo(d.Caching))
diff --git a/internal/configuration/settings/openvpnselection.go b/internal/configuration/settings/openvpnselection.go
index 0e95a1f9..4f681c9f 100644
--- a/internal/configuration/settings/openvpnselection.go
+++ b/internal/configuration/settings/openvpnselection.go
@@ -193,9 +193,6 @@ func (o *OpenVPNSelection) read(r *reader.Reader) (err error) {
 	o.ConfFile = r.Get("OPENVPN_CUSTOM_CONFIG", reader.ForceLowercase(false))
 
 	o.Protocol = r.String("OPENVPN_PROTOCOL", reader.RetroKeys("PROTOCOL"))
-	if err != nil {
-		return err
-	}
 
 	o.CustomPort, err = r.Uint16Ptr("OPENVPN_ENDPOINT_PORT",
 		reader.RetroKeys("PORT", "OPENVPN_PORT", "VPN_ENDPOINT_PORT"))
diff --git a/internal/configuration/settings/wireguard.go b/internal/configuration/settings/wireguard.go
index a4c3460e..f8afb976 100644
--- a/internal/configuration/settings/wireguard.go
+++ b/internal/configuration/settings/wireguard.go
@@ -215,12 +215,12 @@ func (w Wireguard) toLinesNode() (node *gotree.Node) {
 
 	addressesNode := node.Appendf("Interface addresses:")
 	for _, address := range w.Addresses {
-		addressesNode.Appendf(address.String())
+		addressesNode.Append(address.String())
 	}
 
 	allowedIPsNode := node.Appendf("Allowed IPs:")
 	for _, allowedIP := range w.AllowedIPs {
-		allowedIPsNode.Appendf(allowedIP.String())
+		allowedIPsNode.Append(allowedIP.String())
 	}
 
 	if *w.PersistentKeepaliveInterval > 0 {