diff --git a/paperless.nix b/paperless.nix
index 69fe53e..4ca3cb4 100644
--- a/paperless.nix
+++ b/paperless.nix
@@ -19,6 +19,9 @@ in
       PAPERLESS_OCR_USER_ARGS = {
         optimize = 1;
         pdfa_image_compression = "lossless";
+        # do not fail to import documents that have a digital signature
+        # https://github.com/paperless-ngx/paperless-ngx/discussions/4047#discussioncomment-7019544
+        invalidate_digital_signatures = true;
       };
       PAPERLESS_TIME_ZONE = "Europe/Paris";
       PAPERLESS_CONSUMER_ENABLE_BARCODES = "true";