diff --git a/doc/configuration.txt b/doc/configuration.txt
index f579bc157..f4d57874b 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -32314,7 +32314,7 @@ directory <string>
 dns-delay <time>
   When "challenge-ready" includes "dns", configure the delay before the first
   DNS resolution attempt and between retries. The value is a time expressed in
-  HAProxy time format (e.g. "5m", "300s"). Default is 300 seconds.
+  HAProxy time format (e.g. "5m", "300s"). Default is 30 seconds.
 
   Note that the resolution goes through the configured "default" resolvers
   section, not the authoritative name servers. Results may therefore still be
diff --git a/src/acme.c b/src/acme.c
index a1e88250f..bb5d86aa7 100644
--- a/src/acme.c
+++ b/src/acme.c
@@ -197,7 +197,7 @@ struct acme_cfg *new_acme_cfg(const char *name)
 	ret->linenum = 0;
 
 	ret->challenge = strdup("http-01"); /* default value */
-	ret->dns_delay = 300; /* default DNS re-trigger delay in seconds */
+	ret->dns_delay = 30; /* default DNS re-trigger delay in seconds */
 	ret->dns_timeout = 600; /* default DNS retry timeout */
 
 	/* The default generated keys are EC-384 */