diff --git a/hm/gpg/default.nix b/hm/gpg/default.nix
index 45413e2..fe701b3 100644
--- a/hm/gpg/default.nix
+++ b/hm/gpg/default.nix
@@ -34,13 +34,17 @@
         trust = "ultimate";
       }];
     };
-    services.gpg-agent = {
+    services.gpg-agent = rec {
       enableBashIntegration = true;
       enableZshIntegration = true;
       pinentryFlavor = "gnome3";
       # gnome3 is nicer, but requires gcr as a dbus package.
       # Which is in my NixOS config, and on non-NixOS too.
       # It will fall back to ncurses when running in non-graphics mode.
+      defaultCacheTtl = 3600;
+      defaultCacheTtlSsh = defaultCacheTtl;
+      maxCacheTtl = 3*3600;
+      maxCacheTtlSsh = maxCacheTtl;
     };
   };
 }