diff --git a/gallery/src/boxplot/basic_boxplot.rs b/gallery/src/boxplot/basic_boxplot.rs
index 8e44fa0..8c457e1 100644
--- a/gallery/src/boxplot/basic_boxplot.rs
+++ b/gallery/src/boxplot/basic_boxplot.rs
@@ -2,8 +2,8 @@ use charming::{
     component::{Axis, Grid, Title},
     datatype::{DataFrame, DataPoint, DataPointItem},
     element::{
-        AxisPointer, AxisPointerType, AxisType, ItemStyle, SplitArea, SplitLine, TextStyle,
-        Tooltip, Trigger,
+        font_settings::FontWeight, AxisPointer, AxisPointerType, AxisType, ItemStyle, SplitArea,
+        SplitLine, TextStyle, Tooltip, Trigger,
     },
     series::{Boxplot, Scatter},
     Chart,
@@ -34,7 +34,7 @@ pub fn chart() -> Chart {
                 .border_width(1)
                 .text_style(
                     TextStyle::new()
-                        .font_weight("normal")
+                        .font_weight(FontWeight::Normal)
                         .font_size(14)
                         .line_height(20),
                 )
diff --git a/gallery/src/boxplot/boxplot_light_velocity.rs b/gallery/src/boxplot/boxplot_light_velocity.rs
index eb2505a..5e6d084 100644
--- a/gallery/src/boxplot/boxplot_light_velocity.rs
+++ b/gallery/src/boxplot/boxplot_light_velocity.rs
@@ -2,7 +2,8 @@ use charming::{
     component::{Axis, Grid, Title},
     datatype::{Dataset, Transform},
     element::{
-        AxisPointer, AxisPointerType, AxisType, SplitArea, SplitLine, TextStyle, Tooltip, Trigger,
+        font_settings::FontWeight, AxisPointer, AxisPointerType, AxisType, SplitArea, SplitLine,
+        TextStyle, Tooltip, Trigger,
     },
     series::{Boxplot, Scatter},
     Chart,
@@ -54,7 +55,7 @@ pub fn chart() -> Chart {
                 .border_width(1)
                 .text_style(
                     TextStyle::new()
-                        .font_weight("normal")
+                        .font_weight(FontWeight::Normal)
                         .font_size(14)
                         .line_height(20),
                 )
diff --git a/gallery/src/pie/doughnut_chart_with_rounded_corner.rs b/gallery/src/pie/doughnut_chart_with_rounded_corner.rs
index 0b5e401..20ba378 100644
--- a/gallery/src/pie/doughnut_chart_with_rounded_corner.rs
+++ b/gallery/src/pie/doughnut_chart_with_rounded_corner.rs
@@ -1,6 +1,8 @@
 use charming::{
     component::Legend,
-    element::{Emphasis, Label, LabelLine, LabelPosition, Tooltip, Trigger},
+    element::{
+        font_settings::FontWeight, Emphasis, Label, LabelLine, LabelPosition, Tooltip, Trigger,
+    },
     series::Pie,
     Chart,
 };
@@ -16,8 +18,12 @@ pub fn chart() -> Chart {
                 .avoid_label_overlap(false)
                 .label(Label::new().show(false).position(LabelPosition::Center))
                 .emphasis(
-                    Emphasis::new()
-                        .label(Label::new().show(true).font_size(40).font_weight("bold")),
+                    Emphasis::new().label(
+                        Label::new()
+                            .show(true)
+                            .font_size(40)
+                            .font_weight(FontWeight::Bold),
+                    ),
                 )
                 .label_line(LabelLine::new().show(false))
                 .data(vec![