diff --git a/nix/modules/acme-dns.nix b/nix/modules/acme-dns.nix
index 3e5e1e7..e5a6db5 100644
--- a/nix/modules/acme-dns.nix
+++ b/nix/modules/acme-dns.nix
@@ -18,7 +18,9 @@ let
     debug = false
 
     [database]
-    engine = "sqlite3"
+    # acme-dns 2.x registers the embedded driver under `sqlite` (not the
+    # legacy `sqlite3` identifier).
+    engine = "sqlite"
     connection = "/var/lib/acme-dns/acme-dns.db"
 
     [api]