diff --git a/gtk-3.0/gtk-dark.css b/gtk-3.0/gtk-dark.css
index fe3fbe6..9ab9303 100755
--- a/gtk-3.0/gtk-dark.css
+++ b/gtk-3.0/gtk-dark.css
@@ -3056,7 +3056,7 @@ notebook > header {
   notebook > header.top {
     border-bottom-style: solid; }
     notebook > header.top > tabs {
-      margin-bottom: -3px; }
+      margin-bottom: -2px; }
       notebook > header.top > tabs > tab:backdrop {
         box-shadow: none; }
       notebook > header.top > tabs > tab:checked {
diff --git a/gtk-3.0/gtk.css b/gtk-3.0/gtk.css
index 0ee4961..c207908 100755
--- a/gtk-3.0/gtk.css
+++ b/gtk-3.0/gtk.css
@@ -3063,7 +3063,7 @@ notebook > header {
   notebook > header.top {
     border-bottom-style: solid; }
     notebook > header.top > tabs {
-      margin-bottom: -3px; }
+      margin-bottom: -2px; }
       notebook > header.top > tabs > tab:backdrop {
         box-shadow: none; }
       notebook > header.top > tabs > tab:checked {
diff --git a/gtk-3.0/widgets/_notebooks.scss b/gtk-3.0/widgets/_notebooks.scss
index 6851d0f..b5b9503 100644
--- a/gtk-3.0/widgets/_notebooks.scss
+++ b/gtk-3.0/widgets/_notebooks.scss
@@ -18,7 +18,7 @@ notebook {
     &.top {
       border-bottom-style: solid;
       > tabs {
-        margin-bottom: -3px;
+        margin-bottom: -2px;
         > tab {