diff --git a/container.nix b/container.nix
index c4cc62d..cfd8396 100644
--- a/container.nix
+++ b/container.nix
@@ -457,6 +457,14 @@ let
       property = "Tmpfs";
     };
 
+    uidMap = quadletUtils.mkOption {
+      type = types.nullOr types.str;
+      default = null;
+      example = "0:10000:10";
+      description = "--uidmap";
+      property = "UIDMap";
+    };
+
     user = quadletUtils.mkOption {
       type = types.nullOr types.str;
       default = null;