diff --git a/src/content-handlers/iiif/modules/uv-shared-module/BaseExtension.ts b/src/content-handlers/iiif/modules/uv-shared-module/BaseExtension.ts
index 55f44f9cb..1d400dd93 100644
--- a/src/content-handlers/iiif/modules/uv-shared-module/BaseExtension.ts
+++ b/src/content-handlers/iiif/modules/uv-shared-module/BaseExtension.ts
@@ -55,7 +55,7 @@ export class BaseExtension<T extends BaseConfig> implements IExtension {
   $element: JQuery;
   $loginDialogue: JQuery;
   $restrictedDialogue: JQuery;
-  authDialogue: AuthDialogue;  
+  authDialogue: AuthDialogue;
   annotations: AnnotationGroup[] = [];
   clickThroughDialogue: ClickThroughDialogue;
   extensionHost: IIIFExtensionHost;