diff --git a/common/nix.nix b/common/nix.nix
index e65b466..e1f4902 100644
--- a/common/nix.nix
+++ b/common/nix.nix
@@ -4,7 +4,7 @@
   nix.autoOptimiseStore = true;
   nix.gc = {
     automatic = true;
-    dates = "weekly";
+    dates = "10:00";
     options = "--delete-older-than 30d";
   };
 }
diff --git a/work-pc.nix b/work-pc.nix
index f3e3aba..8700b36 100644
--- a/work-pc.nix
+++ b/work-pc.nix
@@ -33,5 +33,8 @@
   # only change this when specified in release notes
   system.stateVersion = "19.09";
 
-  system.autoUpgrade.enable = true;
+  system.autoUpgrade = {
+    enable = true;
+    dates = "10:00";
+  };
 }