diff --git a/README.md b/README.md
index 6a24485..b773e18 100644
--- a/README.md
+++ b/README.md
@@ -533,7 +533,7 @@ _See also: [awesome-selfhosted/Database Management](https://github.com/awesome-s
 *Metric gathering and display software.*
 
 * Collectors only
-  - [Collectd](http://collectd.org/) - System statistic collection daemon.
+  - [Collectd](https://collectd.org/) - System statistic collection daemon.
   - [Collectl](http://collectl.sourceforge.net/) - High precision system performance metrics collecting tool.
   - [Diamond](https://github.com/python-diamond/Diamond) - Python based statistic collection daemon.
   - [Statsd](https://github.com/etsy/statsd/) - Application statistic listener.