diff --git a/ops/nixos/monorepo-gerrit.nix b/ops/nixos/monorepo-gerrit.nix
index ac20b3cb4..fe3be6d72 100644
--- a/ops/nixos/monorepo-gerrit.nix
+++ b/ops/nixos/monorepo-gerrit.nix
@@ -29,6 +29,7 @@ in {
       log.textLogging = false;
       sshd.advertisedAddress = "code.tvl.fyi:29418";
       hooks.path = "${gerritHooks}";
+      cache.web_sessions.maxAge = "3 months";
 
       # Configures gerrit for being reverse-proxied by nginx as per
       # https://gerrit-review.googlesource.com/Documentation/config-reverseproxy.html