diff --git a/common.nix b/common.nix
index 7d6e511..266ede4 100644
--- a/common.nix
+++ b/common.nix
@@ -105,6 +105,14 @@ with builtins;
     bluetooth.enable = true;
   };
 
+  services.chrony = {
+    enable = true;
+    enableNTS = true;
+    serverOption = "offline";
+    extraFlags = [ "-s" ];
+    extraConfig = "makestep 1 -1";
+  };
+
   security.rtkit.enable = true;
 
   users.users.jade = {