diff --git a/config/config.go b/config/config.go
index 816977a..3db9d8a 100644
--- a/config/config.go
+++ b/config/config.go
@@ -1,6 +1,8 @@
 package config
 
 import (
+	"encoding/json"
+	"errors"
 	"log"
 
 	"gopkg.in/yaml.v2"
@@ -30,7 +32,7 @@ type Config struct {
 	ConfigVersion    int               `yaml:"config_version" json:"config_version"`
 }
 
-func DefaultConfig() Config {
+func DefaultConfig() *Config {
 	defaultConfig := Config{}
 	stdProfile := DownloadProfile{Name: "standard youtube-dl video", Command: "youtube-dl", Args: []string{
 		"--newline",
@@ -40,6 +42,8 @@ func DefaultConfig() Config {
 	}}
 
 	defaultConfig.DownloadProfiles = append(defaultConfig.DownloadProfiles, stdProfile)
+	defaultConfig.DownloadProfiles = append(defaultConfig.DownloadProfiles, stdProfile)
+
 	defaultConfig.Server.Port = 6123
 	defaultConfig.Server.Address = "http://localhost:6123"
 	defaultConfig.Server.DownloadPath = "./"
@@ -49,7 +53,25 @@ func DefaultConfig() Config {
 
 	defaultConfig.ConfigVersion = 1
 
-	return defaultConfig
+	return &defaultConfig
+}
+
+func (c *Config) UpdateFromJSON(j []byte) error {
+	newConfig := Config{}
+	err := json.Unmarshal(j, &newConfig)
+	if err != nil {
+		log.Printf("Unmarshal error in config: %v", err)
+		return err
+	}
+	log.Printf("Config is unmarshalled ok")
+
+	// other checks
+	if newConfig.UI.PopupHeight < 100 || newConfig.UI.PopupHeight > 2000 {
+		return errors.New("bad popup height")
+	}
+
+	*c = newConfig
+	return nil
 }
 
 func WriteDefaultConfig(path string) {
diff --git a/main.go b/main.go
index ba9a150..e5ef62b 100644
--- a/main.go
+++ b/main.go
@@ -42,7 +42,7 @@ var versionInfo = version.Info{CurrentVersion: "v0.5.0"}
 //go:embed web
 var webFS embed.FS
 
-var conf config.Config
+var conf *config.Config
 
 func main() {
 	conf = config.DefaultConfig()
@@ -131,7 +131,28 @@ func ConfigHandler(w http.ResponseWriter, r *http.Request) {
 }
 
 func ConfigRESTHandler(w http.ResponseWriter, r *http.Request) {
-	w.WriteHeader(http.StatusOK)
+
+	type errorResponse struct {
+		Error string `json:"error"`
+	}
+
+	if r.Method == "POST" {
+		log.Printf("Updating config")
+		b, err := io.ReadAll(r.Body)
+		if err != nil {
+			panic(err)
+		}
+		log.Printf("Got this request:", string(b))
+		err = conf.UpdateFromJSON(b)
+
+		if err != nil {
+			errorRes := errorResponse{Error: err.Error()}
+			errorResB, _ := json.Marshal(errorRes)
+			w.WriteHeader(400)
+			w.Write(errorResB)
+			return
+		}
+	}
 
 	b, _ := json.Marshal(conf)
 	w.Write(b)
diff --git a/version/version.go b/version/version.go
index f2c5dd5..3981920 100644
--- a/version/version.go
+++ b/version/version.go
@@ -24,7 +24,8 @@ func (i *Info) UpdateGitHubVersion() error {
 	versionUrl := "https://api.github.com/repos/tardisx/gropple/releases"
 	resp, err := http.Get(versionUrl)
 	if err != nil {
-		log.Fatal("Error getting response. ", err)
+		log.Printf("Error getting response. ", err)
+		return err
 	}
 	defer resp.Body.Close()
 
@@ -65,11 +66,11 @@ func (i *Info) canUpgrade() bool {
 	log.Printf("We are %s, github is %s", i.CurrentVersion, i.GithubVersion)
 
 	if !semver.IsValid(i.CurrentVersion) {
-		log.Fatalf("current version %s is invalid", i.CurrentVersion)
+		log.Printf("current version %s is invalid", i.CurrentVersion)
 	}
 
 	if !semver.IsValid(i.GithubVersion) {
-		log.Fatalf("github version %s is invalid", i.GithubVersion)
+		log.Printf("github version %s is invalid", i.GithubVersion)
 	}
 
 	if semver.Compare(i.CurrentVersion, i.GithubVersion) == -1 {
diff --git a/web/config.html b/web/config.html
index 6fbdd07..ff5085f 100644
--- a/web/config.html
+++ b/web/config.html
@@ -5,6 +5,8 @@
 
     <h2>gropple config</h2>
 
+    <p x-text="error_message"></p>
+
     <p x-show="version && version.upgrade_available">
         <a href="https://github.com/tardisx/gropple/releases">Upgrade is available</a> - 
         you have 
@@ -21,7 +23,7 @@
                     <legend>Server</legend>
 
                     <label for="config-server-port">Listen Port</label>
-                    <input type="text" id="config-server-port" placeholder="port number" x-model="config.server.port" />
+                    <input type="text" id="config-server-port" placeholder="port number" x-model.number="config.server.port" />
                     <span class="pure-form-message">The port the web server will listen on.</span>
 
                     <label for="config-server-address">Server address (URL)</label>
@@ -38,11 +40,11 @@
                     <legend>UI</legend>
 
                     <label for="config-ui-popupwidth">Popup Width</label>
-                    <input type="text" id="config-ui-popupwidth" placeholder="width in pixels" x-model="config.ui.popup_width" />
+                    <input type="text" id="config-ui-popupwidth" placeholder="width in pixels" x-model.number="config.ui.popup_width" />
                     <span class="pure-form-message">The width of popup windows in pixels.</span>
 
                     <label for="config-ui-popupheight">Popup Height</label>
-                    <input type="text" id="config-ui-popupheight" placeholder="height in pixels" x-model="config.ui.popup_height" />
+                    <input type="text" id="config-ui-popupheight" placeholder="height in pixels" x-model.number="config.ui.popup_height" />
                     <span class="pure-form-message">The height of popup windows in pixels.</span>
 
                 </fieldset>
@@ -50,21 +52,49 @@
 
         </div>
         <div class="pure-u-md-1-2">
-            <form class="pure-form pure-form-stacked">
+            <form class="pure-form ">
                 <fieldset>
 
                     <legend>Download Profiles</legend>
 
-                    <label for="config-profiles-0-name">Name of this profile</label>
-                    <input type="text" id="config-profiles-0-name" placeholder="name" x-model="config.profiles[0].name" />
-                    <span class="pure-form-message">The name of this profile. For your information only.</span>
+                    <template x-for="(profile, i) in config.profiles">
+                        <div>
+                            <label x-bind:for="'config-profiles-'+i+'-name'">Name of profile <span x-text="i+1"></span></label>
+                            <input type="text" x-bind:id="'config-profiles-'+i+'-name'" placeholder="name" x-model="profile.name" />
+                            <span class="pure-form-message">The name of this profile. For your information only.</span>
+
+                            <label x-bind:for="'config-profiles-'+i+'-command'">Command to run</label>
+                            <input type="text" x-bind:id="'config-profiles-'+i+'-command'" placeholder="name" x-model="profile.command" />
+                            <span class="pure-form-message">Which command to run.</span>
+
+
+                            <label>Args</label>
+
+                            <template x-for="(arg, j) in profile.args">
+                                <div>
+                                    <input type="text" x-bind:id="'config-profiles-'+i+'-arg-'+j" placeholder="arg" x-model="profile.args[j]" />
+                                    <button class="pure-button" href="#" @click.prevent="profile.args.splice(j, 1);;">del</button>
+                                </div>
+                            </template>
+
+                            <button class="pure-button" href="#" @click.prevent="profile.args.push('');">add arg</button>
+
+
+                            <hr>
+
+                        </div>
+                    </template>
 
                 </fieldset>
             </form>
         </div>
-
     </div>
-   
+    <div class="pure-g">
+        <div class="pure-u-1">
+            <button class="pure-button" @click="save_config();" href="#">Save Config</button>
+        </div>
+    </div>
+
 
 </div>
 
@@ -74,7 +104,10 @@
 <script>
     function config() {
         return { 
-            config: { server : {}, ui : {}, profiles: [{}] }, version: {},
+            config: { server : {}, ui : {}, profiles: [] }, 
+            version: {},
+            error_message: '',
+
             fetch_config() {
                 fetch('/rest/config')
                 .then(response => response.json())
@@ -82,10 +115,32 @@
                     this.config = config;
                 })
                 .catch(error => {
-                    console.log('failed to fetch version info - will retry');
-                    setTimeout(() => { this.fetch_version() }, 1000 );
+                    console.log('failed to fetch config', error);
                 });
             },
+            save_config() {
+                console.log(this.config);
+                let op = {
+                   method: 'POST',
+                    body: JSON.stringify(this.config),
+                    headers: { 'Content-Type': 'application/json' }
+                }
+                fetch('/rest/config', op)
+                .then(response => {
+                  if (response.status >= 200 && response.status <= 299) {
+                      return response.json();
+                  } else {
+                    throw Error(response);
+                  }})
+                .then(config => {
+                    console.log('fixing object');
+                    this.config = config;
+                })
+                .catch(error => {
+                    this.error_message = error.error;
+                    console.log('failed to update config', error);
+                });
+            }
         }
     }
 </script>