diff --git a/_Sidebar.md b/_Sidebar.md
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--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -6,8 +6,8 @@
 
 ## Dienste
 
-- [Dynamic Host Configuration Protocol](./Dienste/Dynamic Host Configuration Protocol)
-- [Domain Name System](./Dienste/Domain Name System)
+- [Dynamic Host Configuration Protocol](./Dienste/Dynamic-Host-Configuration-Protocol)
+- [Domain Name System](./Dienste/Domain-Name-System)
 
 ## Tools