diff --git a/src/Design-Core b/src/Design-Core
index 74bd01f..85559f8 160000
--- a/src/Design-Core
+++ b/src/Design-Core
@@ -1 +1 @@
-Subproject commit 74bd01f9acddc14e236b681566605dd6f5b0f70a
+Subproject commit 85559f8f2765ba58d85fb25afa177b2c67126064
diff --git a/src/Design/Layers/layersWindow.js b/src/Design/Layers/layersWindow.js
index 69f5526..0d1e5d2 100644
--- a/src/Design/Layers/layersWindow.js
+++ b/src/Design/Layers/layersWindow.js
@@ -58,7 +58,9 @@ export const LayersWindow = GObject.registerClass({
 
   getLineTypes() {
     const lineStyles = DesignCore.LTypeManager.getItems();
-    const lineStyleNames = lineStyles.map((style) => style.name);
+    // filter out BYLAYER and BYBLOCK
+    const filteredLineStyles = lineStyles.filter((style) => !['BYLAYER', 'BYBLOCK'].includes(style.name.toUpperCase()));
+    const lineStyleNames = filteredLineStyles.map((style) => style.name);
     return lineStyleNames;
   }