diff --git a/ops/nixos/lib/vault-agent.nix b/ops/nixos/lib/vault-agent.nix
index 87aef09d1f..925fee316f 100644
--- a/ops/nixos/lib/vault-agent.nix
+++ b/ops/nixos/lib/vault-agent.nix
@@ -69,6 +69,7 @@ in
         after = [ "network.target" ];
         wantedBy = [ "multi-user.target" ];
         path = with pkgs; [ glibc.bin ];
+        environment.VAULT_CLIENT_TIMEOUT = "15m";
         serviceConfig = {
           RuntimeDirectory = "vault-agent";
           RuntimeDirectoryMode = "0700";