diff --git a/main/ui/src/main/resources/css/theme.css b/main/ui/src/main/resources/css/theme.css
index 81e90cd66..ed15487c5 100644
--- a/main/ui/src/main/resources/css/theme.css
+++ b/main/ui/src/main/resources/css/theme.css
@@ -22,6 +22,20 @@
 	-fx-background-color: PRIMARY_BG;
 }
 
+/*******************************************************************************
+ *                                                                             *
+ * SplitPane                                                                   *
+ *                                                                             *
+ ******************************************************************************/
+
+.split-pane > .split-pane-divider {
+    -fx-padding: 0 2;
+}
+
+.split-pane:horizontal > .split-pane-divider {
+   -fx-background-color: CONTROL_BORDER, WHITE;
+   -fx-background-insets: 0, 0 1;
+}
 
 /*******************************************************************************
  *                                                                             *
diff --git a/main/ui/src/main/resources/fxml/main_window.fxml b/main/ui/src/main/resources/fxml/main_window.fxml
index 45bd350dd..8a7e979b1 100644
--- a/main/ui/src/main/resources/fxml/main_window.fxml
+++ b/main/ui/src/main/resources/fxml/main_window.fxml
@@ -34,7 +34,7 @@
 			</Button>
 		</children>
 	</HBox>
-	<SplitPane VBox.vgrow="ALWAYS" dividerPositions="0.33">
+	<SplitPane VBox.vgrow="ALWAYS" dividerPositions="0.33" orientation="HORIZONTAL">
 		<fx:include source="/fxml/vault_list.fxml" SplitPane.resizableWithParent="false"/>
 		<fx:include source="/fxml/vault_detail.fxml" SplitPane.resizableWithParent="true"/>
 	</SplitPane>