diff --git a/src/main/java/org/gcube/gcat/persistence/ckan/CKANUserCache.java b/src/main/java/org/gcube/gcat/persistence/ckan/CKANUserCache.java
index 5a94f8a..c58f9ab 100644
--- a/src/main/java/org/gcube/gcat/persistence/ckan/CKANUserCache.java
+++ b/src/main/java/org/gcube/gcat/persistence/ckan/CKANUserCache.java
@@ -30,7 +30,7 @@ public abstract class CKANUserCache {
 		
 		userCacheConfiguration = new MutableConfiguration<String,CKANUser>().setTypes(String.class, CKANUser.class)
 				.setStoreByValue(false)
-				.setExpiryPolicyFactory(CreatedExpiryPolicy.factoryOf(new Duration(TimeUnit.MINUTES, 1)));
+				.setExpiryPolicyFactory(CreatedExpiryPolicy.factoryOf(new Duration(TimeUnit.MINUTES, 15)));
 		
 		userCachePerCkanInstance = new HashMap<String,Cache<String,CKANUser>>();
 	}