diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/FloatScrollBarSkin.java b/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/FloatScrollBarSkin.java
index 1b2c39d7a7..47ee72b5e8 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/FloatScrollBarSkin.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/FloatScrollBarSkin.java
@@ -129,12 +129,12 @@ private void setup() {
                 track.heightProperty().unbind();
 
                 if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
-                    track.relocate(0, -8);
+                    track.relocate(0, -4.5);
                     track.widthProperty().bind(scrollBar.widthProperty());
-                    track.setHeight(8);
+                    track.setHeight(4.5);
                 } else {
-                    track.relocate(-8, 0);
-                    track.setWidth(8);
+                    track.relocate(-4.5, 0);
+                    track.setWidth(4.5);
                     track.heightProperty().bind(scrollBar.heightProperty());
                 }
 
@@ -144,13 +144,13 @@ private void setup() {
                 thumb.heightProperty().unbind();
 
                 if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
-                    thumb.relocate(0, -8);
+                    thumb.relocate(0, -4.5);
                     thumb.widthProperty().bind(Bindings.max(20, scrollBar.visibleAmountProperty().divide(range).multiply(scrollBar.widthProperty())));
-                    thumb.setHeight(8);
+                    thumb.setHeight(4.5);
                     thumb.xProperty().bind(Bindings.subtract(scrollBar.widthProperty(), thumb.widthProperty()).multiply(position));
                 } else {
-                    thumb.relocate(-8, 0);
-                    thumb.setWidth(8);
+                    thumb.relocate(-4.5, 0);
+                    thumb.setWidth(4.5);
                     thumb.heightProperty().bind(Bindings.max(20, scrollBar.visibleAmountProperty().divide(range).multiply(scrollBar.heightProperty())));
                     thumb.yProperty().bind(Bindings.subtract(scrollBar.heightProperty(), thumb.heightProperty()).multiply(position));
                 }
@@ -162,7 +162,7 @@ protected double computeMaxWidth(double height) {
                     return Double.MAX_VALUE;
                 }
 
-                return 8;
+                return 4.5;
             }
 
             @Override
@@ -171,7 +171,7 @@ protected double computeMaxHeight(double width) {
                     return Double.MAX_VALUE;
                 }
 
-                return 8;
+                return 4.5;
             }
         };
     }
diff --git a/HMCL/src/main/resources/assets/css/root.css b/HMCL/src/main/resources/assets/css/root.css
index 799882b6d8..87193cc4a1 100644
--- a/HMCL/src/main/resources/assets/css/root.css
+++ b/HMCL/src/main/resources/assets/css/root.css
@@ -29,8 +29,8 @@
 
 .scroll-bar .thumb {
     -fx-fill: -monet-surface-tint;
-    -fx-arc-width: 8;
-    -fx-arc-height: 8;
+    -fx-arc-width: 4.5;
+    -fx-arc-height: 4.5;
 }
 
 .title-label {