diff --git a/client/common/configuration/elements/channel-configuration.ts b/client/common/configuration/elements/channel-configuration.ts
index 46c92b87..e75501c3 100644
--- a/client/common/configuration/elements/channel-configuration.ts
+++ b/client/common/configuration/elements/channel-configuration.ts
@@ -43,7 +43,7 @@ export class ChannelConfigurationElement extends LivechatElement {
     args: () => [this.registerClientOptions]
   })
 
-  private readonly _saveConfig = (ev?: Event): undefined => {
+  private readonly _saveConfig = (ev?: Event): void => {
     ev?.preventDefault()
     if (this._channelDetailsService && this._channelConfiguration) {
       this._channelDetailsService.saveOptions(this._channelConfiguration.channel.id,
diff --git a/client/common/lib/elements/dynamic-table-form.ts b/client/common/lib/elements/dynamic-table-form.ts
index e62200ae..e15c520f 100644
--- a/client/common/lib/elements/dynamic-table-form.ts
+++ b/client/common/lib/elements/dynamic-table-form.ts
@@ -444,7 +444,7 @@ export class DynamicTableFormElement extends LivechatElement {
   _updatePropertyFromValue = (event: Event,
     propertyName: string,
     propertySchema: CellDataSchema,
-    rowId: number): undefined => {
+    rowId: number): void => {
     const target = event.target as (HTMLInputElement | HTMLTextAreaElement | HTMLSelectElement)
     const value = (target)
       ? (target instanceof HTMLInputElement && target.type === 'checkbox')