diff --git a/server/src/acme.rs b/server/src/acme.rs
index a42a37c..8e74998 100644
--- a/server/src/acme.rs
+++ b/server/src/acme.rs
@@ -220,11 +220,11 @@ impl ACMEProvider {
         let cert_chain_pem = loop {
             match order.certificate() {
                 Ok(Some(cert_chain_pem)) => break cert_chain_pem,
-                _ => sleep(Duration::from_secs((1 << (retries + 1)).min(10))).await,
+                _ => sleep(Duration::from_secs(1)).await,
             }
             retries += 1;
             warn!("domain: {domain} order certificate failure at {retries}");
-            if retries > 10 {
+            if retries > 20 {
                 bail!("domain {domain} cert not received")
             }
         };