diff --git a/sys/modules/yubikey.nix b/sys/modules/yubikey.nix
index c5e3008..d360c54 100644
--- a/sys/modules/yubikey.nix
+++ b/sys/modules/yubikey.nix
@@ -25,6 +25,8 @@ in {
       enableSSHSupport = true;
     };
 
+    programs.i3lock.u2fSupport = true;
+
     security.pam = {
       services = {
         login.u2fAuth = true;
diff --git a/sys/platforms/posixlycorrect/default.nix b/sys/platforms/posixlycorrect/default.nix
index b4caa87..7c348b8 100644
--- a/sys/platforms/posixlycorrect/default.nix
+++ b/sys/platforms/posixlycorrect/default.nix
@@ -30,6 +30,8 @@
     };
   };
 
+  programs.i3lock.enable = true;
+
   networking = {
     hostName = "posixlycorrect";
     networkmanager.enable = true;