diff --git a/library/src/main/java/org/apache/fineract/cn/anubis/security/FinKeycloakTenantAuthenticator.java b/library/src/main/java/org/apache/fineract/cn/anubis/security/FinKeycloakTenantAuthenticator.java
index 75b3d16..d1c53d0 100644
--- a/library/src/main/java/org/apache/fineract/cn/anubis/security/FinKeycloakTenantAuthenticator.java
+++ b/library/src/main/java/org/apache/fineract/cn/anubis/security/FinKeycloakTenantAuthenticator.java
@@ -38,6 +38,7 @@
 import java.security.NoSuchAlgorithmException;
 import java.security.spec.InvalidKeySpecException;
 import java.util.List;
+import java.util.Map;
 import java.util.Set;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
@@ -93,7 +94,8 @@
 
 
    if(jwt.getBody().get("fin") != null){
-    final String serializedAccountAccess =  jwt.getBody().get("fin", String.class);
+    Map map=  jwt.getBody().get("fin", Map.class);
+    final String serializedAccountAccess =  gson.toJson(map);
     final AccountAccessTokenContent accountAccess = gson.fromJson(serializedAccountAccess, AccountAccessTokenContent.class);
     final Set<ApplicationPermission> acctPermissions = translateAccountPermissions(accountAccess.getAccounts());
     permissions.addAll(acctPermissions);