diff --git a/flatlaf-core/flatlaf-core-sigtest.txt b/flatlaf-core/flatlaf-core-sigtest.txt
index 6c4872d8..0f6c732c 100644
--- a/flatlaf-core/flatlaf-core-sigtest.txt
+++ b/flatlaf-core/flatlaf-core-sigtest.txt
@@ -1,5 +1,5 @@
 #Signature file v4.1
-#Version 3.0
+#Version 3.1
 
 CLSS public abstract interface com.formdev.flatlaf.FlatClientProperties
 fld public final static java.lang.String BUTTON_TYPE = "JButton.buttonType"
@@ -12,6 +12,7 @@ fld public final static java.lang.String BUTTON_TYPE_TOOLBAR_BUTTON = "toolBarBu
 fld public final static java.lang.String COMPONENT_FOCUS_OWNER = "JComponent.focusOwner"
 fld public final static java.lang.String COMPONENT_ROUND_RECT = "JComponent.roundRect"
 fld public final static java.lang.String COMPONENT_TITLE_BAR_CAPTION = "JComponent.titleBarCaption"
+fld public final static java.lang.String GLASS_PANE_FULL_HEIGHT = "JRootPane.glassPaneFullHeight"
 fld public final static java.lang.String MENU_BAR_EMBEDDED = "JRootPane.menuBarEmbedded"
 fld public final static java.lang.String MINIMUM_HEIGHT = "JComponent.minimumHeight"
 fld public final static java.lang.String MINIMUM_WIDTH = "JComponent.minimumWidth"
@@ -19,6 +20,7 @@ fld public final static java.lang.String OUTLINE = "JComponent.outline"
 fld public final static java.lang.String OUTLINE_ERROR = "error"
 fld public final static java.lang.String OUTLINE_WARNING = "warning"
 fld public final static java.lang.String PLACEHOLDER_TEXT = "JTextField.placeholderText"
+fld public final static java.lang.String POPUP_BORDER_CORNER_RADIUS = "Popup.borderCornerRadius"
 fld public final static java.lang.String POPUP_DROP_SHADOW_PAINTED = "Popup.dropShadowPainted"
 fld public final static java.lang.String POPUP_FORCE_HEAVY_WEIGHT = "Popup.forceHeavyWeight"
 fld public final static java.lang.String PROGRESS_BAR_LARGE_HEIGHT = "JProgressBar.largeHeight"