diff --git a/src/renderer/themes/default.scss b/src/renderer/themes/default.scss
index a163c1ba..a273b68d 100644
--- a/src/renderer/themes/default.scss
+++ b/src/renderer/themes/default.scss
@@ -125,7 +125,7 @@
 
   .ag-header-cell-label {
     font-family: var(--content-font-family);
-    font-weight: 600;
+    font-weight: 500;
     text-transform: uppercase;
   }