diff --git a/pkgs/by-name/pa/paperless-ngx/package.nix b/pkgs/by-name/pa/paperless-ngx/package.nix
index b10e93e142a9..28abf1746711 100644
--- a/pkgs/by-name/pa/paperless-ngx/package.nix
+++ b/pkgs/by-name/pa/paperless-ngx/package.nix
@@ -181,6 +181,7 @@ python.pkgs.buildPythonApplication rec {
     "scikit-learn"
     "tika-client"
     # requested by maintainer
+    "imap-tools"
     "ocrmypdf"
   ];