diff --git a/README.md b/README.md
index ae40319..da70f48 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ This library is not affiliated with Kostal and is no offical product of KOSTAL S
 ## Features
 
 * Authenticate (Login, Logout, Check authentication)
-* Read settings
+* Read/Write settings
 * Read processdata
 * Read events
 
@@ -68,6 +68,15 @@ Use "golrackpi [command] --help" for more information about a command.
 ## Documentation
 
 ...todo...
+## Write settings
+
+Available settings can be found in the swagger documentation of the inverter or by calling `client.Settings()``. The following example shows how to activate smart battery control:
+
+```go
+  module := golrackpi.ModuleSettings{ModuleId: "devices:local"}
+  module.Settings = []golrackpi.SettingsValues{golrackpi.SettingsValues{Id: "Battery:SmartBatteryControl:Enable", Value: "1"}}
+  client.UpdateSettings([]golrackpi.ModuleSettings{module})
+```
 
 ## License
 
diff --git a/auth.go b/auth.go
index 9f28717..84d840f 100644
--- a/auth.go
+++ b/auth.go
@@ -10,12 +10,12 @@ import (
 	"crypto/cipher"
 	"crypto/hmac"
 	"errors"
+	"io"
 
 	"crypto/sha256"
 	b64 "encoding/base64"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 
 	"github.com/geschke/golrackpi/internal/helper"
 
@@ -136,7 +136,7 @@ func (c *AuthClient) Login() (string, error) {
 		return "", errors.New("request returned with http error " + resp.Status)
 	}
 
-	responseBody, err := ioutil.ReadAll(resp.Body)
+	responseBody, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return "", errors.New("could not read authentication response")
 	}
@@ -196,7 +196,7 @@ func (c *AuthClient) Login() (string, error) {
 
 	defer respFinish.Body.Close()
 
-	responseFinishBody, err := ioutil.ReadAll(respFinish.Body)
+	responseFinishBody, err := io.ReadAll(respFinish.Body)
 	if err != nil {
 		//Failed to read response.
 		return "", errors.New("could not read from authentication finish request")
@@ -275,7 +275,7 @@ func (c *AuthClient) Login() (string, error) {
 	}
 	defer respCreateSession.Body.Close()
 
-	responseCreateSessionBody, err := ioutil.ReadAll(respCreateSession.Body)
+	responseCreateSessionBody, err := io.ReadAll(respCreateSession.Body)
 	if err != nil {
 		return "", errors.New("could not read from create session request")
 	}
@@ -337,7 +337,7 @@ func (c *AuthClient) Me() (map[string]interface{}, error) {
 	}
 	defer response.Body.Close()
 
-	body, err := ioutil.ReadAll(response.Body)
+	body, err := io.ReadAll(response.Body)
 	if err != nil {
 	}
 	var jsonResult interface{}
diff --git a/events.go b/events.go
index fb0ed7f..8118615 100644
--- a/events.go
+++ b/events.go
@@ -7,7 +7,8 @@ package golrackpi
 import (
 	"bytes"
 	"encoding/json"
-	"io/ioutil"
+	"io"
+
 	"net/http"
 
 	"github.com/geschke/golrackpi/internal/timefix"
@@ -67,7 +68,7 @@ func (c *AuthClient) EventsWithParam(language string, max int) ([]EventData, err
 	}
 	defer response.Body.Close()
 
-	body, err := ioutil.ReadAll(response.Body)
+	body, err := io.ReadAll(response.Body)
 	if err != nil {
 		return jsonResult, err
 	}
@@ -98,7 +99,7 @@ func (c *AuthClient) Events() ([]EventData, error) {
 	}
 	defer response.Body.Close()
 
-	body, err := ioutil.ReadAll(response.Body)
+	body, err := io.ReadAll(response.Body)
 	if err != nil {
 		return jsonResult, err
 	}
diff --git a/go.mod b/go.mod
index 4ea6e75..7bfa193 100644
--- a/go.mod
+++ b/go.mod
@@ -1,8 +1,13 @@
 module github.com/geschke/golrackpi
 
-go 1.16
+go 1.21
 
 require (
-	github.com/spf13/cobra v1.4.0
-	golang.org/x/crypto v0.0.0-20220331220935-ae2d96664a29
+	github.com/spf13/cobra v1.8.0
+	golang.org/x/crypto v0.18.0
+)
+
+require (
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
 )
diff --git a/go.sum b/go.sum
index c9c333d..d176669 100644
--- a/go.sum
+++ b/go.sum
@@ -1,19 +1,12 @@
-github.com/cpuguy83/go-md2man/v2 v2.0.1/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
-github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
-github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
+github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
+github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
-github.com/spf13/cobra v1.4.0 h1:y+wJpx64xcgO1V+RcnwW0LEHxTKRi2ZDPSBjWnrg88Q=
-github.com/spf13/cobra v1.4.0/go.mod h1:Wo4iy3BUC+X2Fybo0PDqwJIv3dNRiZLHQymsfxlB84g=
+github.com/spf13/cobra v1.8.0 h1:7aJaZx1B85qltLMc546zn58BxxfZdR/W22ej9CFoEf0=
+github.com/spf13/cobra v1.8.0/go.mod h1:WXLWApfZ71AjXPya3WOlMsY9yMs7YeiHhFVlvLyhcho=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-golang.org/x/crypto v0.0.0-20220331220935-ae2d96664a29 h1:tkVvjkPTB7pnW3jnid7kNyAMPVWllTNOf/qKDze4p9o=
-golang.org/x/crypto v0.0.0-20220331220935-ae2d96664a29/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
-golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/crypto v0.18.0 h1:PGVlW0xEltQnzFZ55hkuX5+KLyrMYhHld1YHO4AKcdc=
+golang.org/x/crypto v0.18.0/go.mod h1:R0j02AL6hcrfOiy9T4ZYp/rcWeMxM3L6QYxlOuEG1mg=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/info.go b/info.go
index f729e6c..cca653a 100644
--- a/info.go
+++ b/info.go
@@ -7,8 +7,8 @@ package golrackpi
 import (
 	"encoding/json"
 	"errors"
+	"io"
 
-	"io/ioutil"
 	"net/http"
 )
 
@@ -30,7 +30,7 @@ func (c *AuthClient) Version() (map[string]interface{}, error) {
 
 	}
 
-	body, err := ioutil.ReadAll(response.Body)
+	body, err := io.ReadAll(response.Body)
 	if err != nil {
 		return result, err
 	}
diff --git a/modules.go b/modules.go
index b4faf90..1c822ce 100644
--- a/modules.go
+++ b/modules.go
@@ -6,8 +6,8 @@ package golrackpi
 
 import (
 	"encoding/json"
+	"io"
 
-	"io/ioutil"
 	"net/http"
 )
 
@@ -35,7 +35,7 @@ func (c *AuthClient) Modules() ([]ModuleData, error) {
 	}
 	defer response.Body.Close()
 
-	body, err := ioutil.ReadAll(response.Body)
+	body, err := io.ReadAll(response.Body)
 	if err != nil {
 		return moduleData, err
 
diff --git a/processdata.go b/processdata.go
index 901ad10..6259795 100644
--- a/processdata.go
+++ b/processdata.go
@@ -7,9 +7,9 @@ package golrackpi
 import (
 	"bytes"
 	"encoding/json"
+	"io"
 	"strings"
 
-	"io/ioutil"
 	"net/http"
 )
 
@@ -54,7 +54,7 @@ func (c *AuthClient) ProcessData() ([]ProcessData, error) {
 	}
 	defer response.Body.Close()
 
-	body, err := ioutil.ReadAll(response.Body)
+	body, err := io.ReadAll(response.Body)
 	if err != nil {
 		return processData, err
 	}
@@ -87,7 +87,7 @@ func (c *AuthClient) ProcessDataModule(moduleId string) ([]ProcessDataValues, er
 	}
 	defer response.Body.Close()
 
-	body, err := ioutil.ReadAll(response.Body)
+	body, err := io.ReadAll(response.Body)
 	if err != nil {
 		return processDataValues, err
 	}
@@ -129,7 +129,7 @@ func (c *AuthClient) ProcessDataModuleValues(moduleId string, processDataIds ...
 	}
 	defer response.Body.Close()
 
-	body, err := ioutil.ReadAll(response.Body)
+	body, err := io.ReadAll(response.Body)
 	if err != nil {
 		return processDataValues, err
 	}
@@ -170,7 +170,7 @@ func (c *AuthClient) ProcessDataValues(v []ProcessData) ([]ProcessDataValues, er
 	}
 	defer response.Body.Close()
 
-	body, err := ioutil.ReadAll(response.Body)
+	body, err := io.ReadAll(response.Body)
 	if err != nil {
 		return processDataValues, err
 	}
diff --git a/settings.go b/settings.go
index f2f5ef2..4bea39b 100644
--- a/settings.go
+++ b/settings.go
@@ -5,11 +5,13 @@
 package golrackpi
 
 import (
+	"bytes"
 	"encoding/json"
+	"io"
 	"strings"
 
 	"errors"
-	"io/ioutil"
+
 	"net/http"
 )
 
@@ -57,7 +59,7 @@ func (c *AuthClient) Settings() ([]SettingsData, error) {
 	}
 	defer response.Body.Close()
 
-	body, err := ioutil.ReadAll(response.Body)
+	body, err := io.ReadAll(response.Body)
 	if err != nil {
 		return jsonResult, err
 	}
@@ -90,7 +92,7 @@ func (c *AuthClient) SettingsModule(moduleid string) ([]SettingsValues, error) {
 	if response.StatusCode != 200 {
 		return jsonResult, errors.New("module or setting not found")
 	}
-	body, err := ioutil.ReadAll(response.Body)
+	body, err := io.ReadAll(response.Body)
 	if err != nil {
 		return jsonResult, err
 	}
@@ -126,7 +128,7 @@ func (c *AuthClient) SettingsModuleSetting(moduleid string, settingid string) ([
 		return jsonResult, errors.New("module or setting not found")
 	}
 
-	body, err := ioutil.ReadAll(response.Body)
+	body, err := io.ReadAll(response.Body)
 	if err != nil {
 		return jsonResult, err
 	}
@@ -167,7 +169,7 @@ func (c *AuthClient) SettingsModuleSettings(moduleid string, settingids ...strin
 		return jsonResult, errors.New("module or setting not found")
 	}
 
-	body, err := ioutil.ReadAll(response.Body)
+	body, err := io.ReadAll(response.Body)
 	if err != nil {
 		return jsonResult, err
 	}
@@ -180,3 +182,51 @@ func (c *AuthClient) SettingsModuleSettings(moduleid string, settingids ...strin
 
 	return jsonResult, nil
 }
+
+// ModuleSettings specifies the structure of the request body for the "settings" endpoint.
+type ModuleSettings struct {
+	Settings []SettingsValues `json:"settings"`
+	ModuleId string           `json:"moduleid"`
+}
+
+// write settings
+func (c *AuthClient) UpdateSettings(settings []ModuleSettings) ([]ModuleSettings, error) {
+	jsonResult := []ModuleSettings{}
+	jsonPayload, err := json.Marshal(settings)
+
+	if err != nil {
+		return jsonResult, err
+	}
+
+	client := http.Client{}
+	request, err := http.NewRequest("PUT", c.getUrl("/api/v1/settings"), bytes.NewBuffer(jsonPayload))
+	if err != nil {
+		return jsonResult, err
+	}
+
+	request.Header.Add("authorization", "Session "+c.SessionId)
+	request.Header.Add("Content-Type", "application/json")
+
+	response, err := client.Do(request)
+	if err != nil {
+		return jsonResult, err
+	}
+	defer response.Body.Close()
+
+	if response.StatusCode != 200 {
+		return jsonResult, err
+	}
+
+	body, err := io.ReadAll(response.Body) // response body is []byte
+	if err != nil {
+		return jsonResult, err
+	}
+
+	err = json.Unmarshal(body, &jsonResult)
+	if err != nil {
+		return jsonResult, err
+
+	}
+
+	return jsonResult, err
+}