diff --git a/src/Squidex/appsettings.json b/src/Squidex/appsettings.json
index ea9bf1082..2309079e0 100644
--- a/src/Squidex/appsettings.json
+++ b/src/Squidex/appsettings.json
@@ -16,7 +16,7 @@
       // Regex for phone numbers.
       "Phone": "^\\(*\\+*[1-9]{0,3}\\)*-*[1-9]{0,3}[-. /]*\\(*[2-9]\\d{2}\\)*[-. /]*\\d{3}[-. /]*\\d{4} *e*x*t*\\.* *\\d{0,4}$",
       // Regex for slugs (e.g. hello-world).
-      "Slug": "^[a-z0-9]+(\\\\-[a-z0-9]+)*$",
+      "Slug": "^[a-z0-9]+(\\-[a-z0-9]+)*$",
       // Regex for urls.
       "Url": "^(?:http(s)?:\\/\\/)?[\\w.-]+(?:\\.[\\w\\.-]+)+[\\w\\-\\._~:/?#[\\]@!\\$&'\\(\\)\\*\\+,;=.]+$"
     },