diff --git a/Tusker/Views/TrendHistoryView.swift b/Tusker/Views/TrendHistoryView.swift
index 00a0c845..ffdb556a 100644
--- a/Tusker/Views/TrendHistoryView.swift
+++ b/Tusker/Views/TrendHistoryView.swift
@@ -97,7 +97,7 @@ class TrendHistoryView: UIView {
         borderLayer.path = path.cgPath.copy()!
         borderLayer.strokeColor = tintColor.cgColor
         borderLayer.fillColor = nil
-        borderLayer.lineWidth = 2
+        borderLayer.lineWidth = lineWidth
         borderLayer.lineCap = .round
         
         path.addLine(to: CGPoint(x: bounds.width, y: bounds.height))
@@ -109,12 +109,16 @@ class TrendHistoryView: UIView {
         let fillColor = self.fillColor()
         fillLayer.strokeColor = fillColor
         fillLayer.fillColor = fillColor
-        fillLayer.lineWidth = 2
+        fillLayer.lineWidth = lineWidth
         
         layer.addSublayer(fillLayer)
         layer.addSublayer(borderLayer)
     }
     
+    private var lineWidth: CGFloat {
+        (traitCollection.preferredContentSizeCategory > .large || UIAccessibility.isBoldTextEnabled) ? 4 : 2
+    }
+    
     // The non-transparent fill color.
     // We blend with the view's background color ourselves so that final color is non-transparent,
     // otherwise when the fill layer's border and fill overlap, there's a visibly darker patch