diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4fc00a6e..40ef2b86 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ FlatLaf Change Log
   - changed style to rounded rectangle
   - fixed painting issues on low values
 - ProgressBar: Support configure of arc with `ProgressBar.arc`.
+- ProgressBar: Reduced thickness from 6 to 4.
 - TabbedPane: Support background color for selected tabs
   (`TabbedPane.selectedBackground`) and separators between tabs
   (`TabbedPane.showTabSeparators`).
diff --git a/flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatLaf.properties b/flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatLaf.properties
index 99a5b323..1f848c1d 100644
--- a/flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatLaf.properties
+++ b/flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatLaf.properties
@@ -269,9 +269,9 @@ PopupMenuSeparator.stripeIndent=4
 #---- ProgressBar ----
 
 ProgressBar.border=com.formdev.flatlaf.ui.FlatEmptyBorder
-ProgressBar.arc=6
-ProgressBar.horizontalSize=146,6
-ProgressBar.verticalSize=6,146
+ProgressBar.arc=4
+ProgressBar.horizontalSize=146,4
+ProgressBar.verticalSize=4,146
 
 
 #---- RadioButton ----