diff --git a/sites.md b/sites.md
index adefef8..b1df3fb 100644
--- a/sites.md
+++ b/sites.md
@@ -109,3 +109,4 @@
 * https://tools.kaklabs.com
 * https://eppendocs.de
 * https://sparrowmobile.com/
+* https://www.projektmanagementblog.de/