diff --git a/README.md b/README.md
index c705194..4bdcde9 100644
--- a/README.md
+++ b/README.md
@@ -45,8 +45,14 @@ If the flag `-config` is not used the configuration is expected at
 "Muc":           "muc-to-feed@conference.example.com",
 "MucNick":       "feedbot",
 "MaxArticles":    5,
-"NoExcerpt":      false,
+"RefreshTime":    30,
+"NoExcerpt":     false,
 "Feeds":         [ "https://www.debian.org/News/news",
                  "https://www.debian.org/security/dsa-long" ]
 }
 ```
+
+`MaxArticles` is the maximum number of articles that are sent per
+feed and query. If `NoExcerpt` is set to *true* no excerpt will be
+posted. `RefreshTime` defines the intervall for checking the feeds
+in seconds.
\ No newline at end of file
diff --git a/config.json.example b/config.json.example
index 2bd6364..af954b9 100644
--- a/config.json.example
+++ b/config.json.example
@@ -5,6 +5,7 @@
 "Muc":           "muc-to-feed@conference.example.com",
 "MucNick":       "feedbot",
 "MaxArticles":    5,
+"RefreshTime":    30,
 "NoExcerpt":     false,
 "Feeds":         [ "https://www.debian.org/News/news", 
                  "https://www.debian.org/security/dsa-long" ]
diff --git a/feed-to-muc.go b/feed-to-muc.go
index 6603262..18e8e77 100644
--- a/feed-to-muc.go
+++ b/feed-to-muc.go
@@ -36,6 +36,7 @@ func main() {
 		Muc           string
 		MucNick       string
 		MaxArticles   int
+		RefreshTime   time.Duration
 		NoExcerpt     bool
 		Feeds         []string
 	}
@@ -144,6 +145,11 @@ func main() {
 	// Starting goroutine to process received stanzas.
 	go processStanzas(client)
 
+	// Set RefreshTime to 30 seconds if not defined.
+	if config.RefreshTime == 0 {
+		config.RefreshTime = 30
+	}
+
 	for {
 		// Check all configured feeds for new articles and send
 		// new articles to configured MUC.
@@ -165,7 +171,7 @@ func main() {
 			}
 		}
 		// Wait 30 seconds before checking feeds again.
-		time.Sleep(30 * time.Second)
+		time.Sleep(config.RefreshTime * time.Second)
 	}
 }