diff --git a/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/python_api/adapter/VisualLayoutParsingAdapter.java b/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/python_api/adapter/VisualLayoutParsingAdapter.java
index 3501b36..3eca613 100644
--- a/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/python_api/adapter/VisualLayoutParsingAdapter.java
+++ b/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/python_api/adapter/VisualLayoutParsingAdapter.java
@@ -33,13 +33,16 @@ public class VisualLayoutParsingAdapter {
     }
 
     public Map<Integer, List<ClassifiedImage>> buildExtractedSignaturesPerPage(VisualLayoutParsingResponse visualLayoutParsingResponse) {
+        if(visualLayoutParsingResponse != null) {
 
-        Map<Integer, List<ClassifiedImage>> tableCells = new HashMap<>();
-        visualLayoutParsingResponse.getData()
-                .forEach(tableData -> tableCells.computeIfAbsent(tableData.getPage_idx(), tableCell -> new ArrayList<>()).addAll(convertSignatures(tableData.getPage_idx(),tableData.getBoxes())));
-
-        return tableCells;
+            Map<Integer, List<ClassifiedImage>> signatures = new HashMap<>();
+            visualLayoutParsingResponse.getData()
+                    .forEach(tableData -> signatures.computeIfAbsent(tableData.getPage_idx(), tableCell -> new ArrayList<>())
+                            .addAll(convertSignatures(tableData.getPage_idx(), tableData.getBoxes())));
 
+            return signatures;
+        }
+        return null;
     }