diff --git a/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/docstrum/service/LineBuilderService.java b/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/docstrum/service/LineBuilderService.java
index 6c9f987..4e5f8d8 100644
--- a/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/docstrum/service/LineBuilderService.java
+++ b/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/docstrum/service/LineBuilderService.java
@@ -32,6 +32,9 @@ public class LineBuilderService {
         characters.forEach(character -> {
             character.getNeighbors()
                     .forEach(neighbor -> {
+                        if (!characters.contains(neighbor.getCharacter())) {
+                            return;
+                        }
                         double normalizedHorizontalDistance = neighbor.getHorizontalDistance() / maxHorizontalDistance;
                         double normalizedVerticalDistance = neighbor.getVerticalDistance() / maxVerticalDistance;
 
diff --git a/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/services/TextRulingsClassifier.java b/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/services/TextRulingsClassifier.java
index 3f203e6..8ef6f77 100644
--- a/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/services/TextRulingsClassifier.java
+++ b/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/services/TextRulingsClassifier.java
@@ -12,7 +12,7 @@ import lombok.experimental.UtilityClass;
 @UtilityClass
 public class TextRulingsClassifier {
 
-    private final static double STRIKETHROUGH_ZONE = 0.5; // multiplied with text height, determines height of intersection interval for strikethrough lines.
+    private final static double STRIKETHROUGH_ZONE = 0.65; // multiplied with text height, determines height of intersection interval for strikethrough lines.
     private final static double UNDERLINE_ZONE = 0.2; // multiplied with text height, determines height of intersection interval of underline lines.
     private final static double TEXT_BBOX_THRESHOLD_FACTOR = 0.15; // multiplied with text width then subtracted from word width. If ruling covers this width, it is considered as strikethrough/underline.