diff --git a/build.gradle b/build.gradle
index 276fd74..2b3a64a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -52,9 +52,14 @@ subprojects {
 	
 	// the repositories for external depenencies
 	repositories {
-		maven { url 'http://repo.lucares.de/' }
-		mavenCentral()
-		jcenter()
+		maven { 
+		  url 'https://repo.lucares.de/'
+		  content { includeGroup "org.lucares" }
+        }
+		mavenCentral(content: { excludeGroup "org.lucares" })
+		jcenter{
+		  content { excludeGroup "org.lucares" }
+		}
 	}
 	
 	// In this example we use TestNG as our testing tool. JUnit is the default.