diff --git a/tools/nextwks-tool/main.go b/tools/nextwks-tool/main.go
index dedff1c..f1a6247 100644
--- a/tools/nextwks-tool/main.go
+++ b/tools/nextwks-tool/main.go
@@ -184,6 +184,9 @@ func obtainCertsLego(domains []string, email, backupDir, legoDir, legoPath strin
 			continue
 		}
 
+		// Small delay so port 80 is released between runs
+		time.Sleep(2 * time.Second)
+
 		// Copy cert to per-domain backup
 		crtSrc := filepath.Join(certDir, domain+".crt")
 		keySrc := filepath.Join(certDir, domain+".key")