diff --git a/go.mod b/go.mod
index 5b141793d..8e84a9c1a 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@ module github.com/hetznercloud/cli
 
 go 1.25.0
 
-toolchain go1.26.8
+toolchain go1.27.1
 
 require (
 	github.com/BurntSushi/toml v1.6.0
diff --git a/internal/state/config/preferences.go b/internal/state/config/preferences.go
index c1db41666..05493a2d2 100644
--- a/internal/state/config/preferences.go
+++ b/internal/state/config/preferences.go
@@ -3,6 +3,7 @@ package config
 import (
 	"bytes"
 	"fmt"
+	"slices"
 	"strings"
 
 	"github.com/BurntSushi/toml"
@@ -57,8 +58,8 @@ func (p Preferences) Unset(key string) bool {
 			_, ok := m[key]
 			delete(m, key)
 			// delete parent maps if they are empty
-			for i := len(parents) - 1; i >= 0; i-- {
-				if len(parents[i]) == 0 {
+			for i, parent := range slices.Backward(parents) {
+				if len(parent) == 0 {
 					if i > 0 {
 						delete(parents[i-1], path[i-1])
 					}
diff --git a/mise.toml b/mise.toml
index 96bff494e..03aedbcb1 100644
--- a/mise.toml
+++ b/mise.toml
@@ -1,5 +1,5 @@
 [tools]
-go = "1.26.8"
+go = "1.27.1"
 "go:go.uber.org/mock/mockgen" = "v0.6.0"
 "github:golangci/golangci-lint" = "2.14.0"
 "github:goreleaser/goreleaser" = "v2.18.2"