diff --git a/tsunemori/configuration.nix b/tsunemori/configuration.nix
index e02b68a..c2ac4bd 100644
--- a/tsunemori/configuration.nix
+++ b/tsunemori/configuration.nix
@@ -43,6 +43,7 @@
     #unzip
   ];
 
+  allowUnfree = true;
   environment.etcBackupExtension = ".bak";
   system.stateVersion = "24.05";
 }