diff --git a/extensions/DigiDocQL/PreviewViewController.mm b/extensions/DigiDocQL/PreviewViewController.mm
index 7f45c315f..911bb2d3d 100644
--- a/extensions/DigiDocQL/PreviewViewController.mm
+++ b/extensions/DigiDocQL/PreviewViewController.mm
@@ -100,7 +100,7 @@ - (void)providePreviewForFileRequest:(QLFilePreviewRequest *)request
NSISO8601DateFormatter *dfrom = [[NSISO8601DateFormatter alloc] init];
NSDateFormatter *dto = [[NSDateFormatter alloc] init];
[dto setTimeZone: [NSTimeZone defaultTimeZone]];
- [dto setDateFormat:@"YYYY-MM-dd HH:mm:ss z"];
+ [dto setDateFormat:@"yyyy-MM-dd HH:mm:ss z"];
NSMutableString *h = [NSMutableString stringWithString:@R"(