diff --git a/hosts/abacus/microbin.nix b/hosts/abacus/microbin.nix
index 9206353..cb2c83c 100644
--- a/hosts/abacus/microbin.nix
+++ b/hosts/abacus/microbin.nix
@@ -11,6 +11,8 @@ in {
       MICROBIN_BIND = "127.0.0.1";
       MICROBIN_PORT = 8020;
 
+      MICROBIN_READONLY = true;
+
       MICROBIN_PUBLIC_PATH = "https://${virtualHostName}/";
       MICROBIN_QR = true;