diff --git a/pom.xml b/pom.xml
index 95f7fe5..9338003 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>org.sadtech.autoresponder</groupId>
     <artifactId>core</artifactId>
-    <version>1.1.1-RELEASE</version>
+    <version>1.1.2-SNAPHOT</version>
     <build>
         <plugins>
             <plugin>
diff --git a/src/main/java/org/sadtech/autoresponder/repository/UnitRepository.java b/src/main/java/org/sadtech/autoresponder/repository/UnitRepository.java
index d069a1e..2c946bc 100644
--- a/src/main/java/org/sadtech/autoresponder/repository/UnitRepository.java
+++ b/src/main/java/org/sadtech/autoresponder/repository/UnitRepository.java
@@ -5,14 +5,12 @@ import org.sadtech.autoresponder.entity.Unit;
 import java.util.Collection;
 import java.util.List;
 
-public interface UnitRepository {
+public interface UnitRepository<T extends Unit> {
 
-    void addUnit(Unit unit);
+    void addUnit(T unit);
 
-    void addUnits(Collection<Unit> units);
+    void addUnits(Collection<T> units);
 
-    void removeUnit(Unit idUnit);
-
-    List<Unit> menuUnits();
+    List<T> menuUnits();
 
 }