diff --git a/src/main/java/org/gcube/smartgears/managers/ApplicationManager.java b/src/main/java/org/gcube/smartgears/managers/ApplicationManager.java
index c4b4b74..38fbe42 100644
--- a/src/main/java/org/gcube/smartgears/managers/ApplicationManager.java
+++ b/src/main/java/org/gcube/smartgears/managers/ApplicationManager.java
@@ -13,10 +13,8 @@ import java.io.File;
 import java.io.FileOutputStream;
 import java.io.ObjectOutputStream;
 import java.util.Collection;
-import java.util.HashSet;
 import java.util.List;
 import java.util.Map.Entry;
-import java.util.Set;
 import java.util.stream.Collectors;
 
 import javax.servlet.FilterRegistration;
diff --git a/src/main/java/org/gcube/smartgears/managers/ContainerManager.java b/src/main/java/org/gcube/smartgears/managers/ContainerManager.java
index 7e99092..9d3d327 100644
--- a/src/main/java/org/gcube/smartgears/managers/ContainerManager.java
+++ b/src/main/java/org/gcube/smartgears/managers/ContainerManager.java
@@ -10,7 +10,6 @@ import static org.gcube.smartgears.provider.ProviderFactory.provider;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.ObjectOutputStream;
-import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;