diff --git a/build.gradle b/build.gradle
index 7bafe49..af0e088 100644
--- a/build.gradle
+++ b/build.gradle
@@ -25,4 +25,5 @@
     providedRuntime 'org.springframework.boot:spring-boot-starter-tomcat'
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
     compile("com.fasterxml.jackson.core:jackson-databind")
+    compile 'org.hibernate:hibernate-core:5.4.2.Final'
 }
diff --git a/src/main/java/com/example/cosmos_serversb/models/Groups.java b/src/main/java/com/example/cosmos_serversb/models/Groups.java
index e5ea925..9986a26 100644
--- a/src/main/java/com/example/cosmos_serversb/models/Groups.java
+++ b/src/main/java/com/example/cosmos_serversb/models/Groups.java
@@ -2,8 +2,10 @@
 
 import java.util.*;
 import javax.inject.Singleton;
+import javax.persistence.Column;
 import com.example.cosmos_serversb.entities.*;
 
+
 @Singleton
 public class Groups {
     private static Groups thaInstance = null;