diff --git a/src/const.js b/src/const.js
index 850fa88..8ecace1 100644
--- a/src/const.js
+++ b/src/const.js
@@ -22,3 +22,5 @@ export const NOTIFY_CONFIG_RELOAD = 'configReload'
 export const NOTIFY_ERROR = 'error'
 export const NOTIFY_FETCH_ERROR = 'fetchError'
 export const NOTIFY_LOADING_DATA = 'loadingData'
+
+export const REGEXP_USER = /^[a-z0-9_]{4,25}$/
diff --git a/src/generalConfig.vue b/src/generalConfig.vue
index c595aea..3877e66 100644
--- a/src/generalConfig.vue
+++ b/src/generalConfig.vue
@@ -56,11 +56,13 @@
               <b-input-group>
                 <b-form-input
                   v-model="models.addChannel"
+                  :state="!!validateUserName(models.addChannel)"
                   @keyup.enter="addChannel"
                 />
                 <b-input-group-append>
                   <b-button
                     variant="success"
+                    :disabled="!validateUserName(models.addChannel)"
                     @click="addChannel"
                   >
                     <font-awesome-icon
@@ -117,11 +119,13 @@
               <b-input-group>
                 <b-form-input
                   v-model="models.addEditor"
+                  :state="!!validateUserName(models.addEditor)"
                   @keyup.enter="addEditor"
                 />
                 <b-input-group-append>
                   <b-button
                     variant="success"
+                    :disabled="!validateUserName(models.addEditor)"
                     @click="addEditor"
                   >
                     <font-awesome-icon
@@ -416,6 +420,10 @@ export default {
 
   methods: {
     addChannel() {
+      if (!this.validateUserName(this.models.addChannel)) {
+        return
+      }
+
       this.generalConfig.channels.push(this.models.addChannel.replace(/^#*/, ''))
       this.models.addChannel = ''
 
@@ -423,6 +431,10 @@ export default {
     },
 
     addEditor() {
+      if (!this.validateUserName(this.models.addEditor)) {
+        return
+      }
+
       this.fetchProfile(this.models.addEditor)
       this.generalConfig.bot_editors.push(this.models.addEditor)
       this.models.addEditor = ''
@@ -566,6 +578,10 @@ export default {
         })
         .catch(err => this.$bus.$emit(constants.NOTIFY_FETCH_ERROR, err))
     },
+
+    validateUserName(user) {
+      return user.match(constants.REGEXP_USER)
+    },
   },
 
   mounted() {