diff --git a/public/app/plugins/panel/heatmap/rendering.ts b/public/app/plugins/panel/heatmap/rendering.ts
index 00774df7c73..48264645bdf 100644
--- a/public/app/plugins/panel/heatmap/rendering.ts
+++ b/public/app/plugins/panel/heatmap/rendering.ts
@@ -23,7 +23,7 @@ const MIN_CARD_SIZE = 1,
   CARD_ROUND = 0,
   DATA_RANGE_WIDING_FACTOR = 1.2,
   DEFAULT_X_TICK_SIZE_PX = 100,
-  DEFAULT_Y_TICK_SIZE_PX = 50,
+  DEFAULT_Y_TICK_SIZE_PX = 22.5,
   X_AXIS_TICK_PADDING = 10,
   Y_AXIS_TICK_PADDING = 5,
   MIN_SELECTION_WIDTH = 2;