diff --git a/src/Models/CommitGraph.cs b/src/Models/CommitGraph.cs
index deda6c04..6c6305fc 100644
--- a/src/Models/CommitGraph.cs
+++ b/src/Models/CommitGraph.cs
@@ -113,7 +113,7 @@ namespace SourceGit.Models
             private set;
         } = new List<Pen>();
 
-        public static void SetDefaultPens(double thickness = 1.5)
+        public static void SetDefaultPens(double thickness = 2)
         {
             SetPens(_defaultPenColors, thickness);
         }
diff --git a/src/Models/ThemeOverrides.cs b/src/Models/ThemeOverrides.cs
index b231353c..e14b1f1a 100644
--- a/src/Models/ThemeOverrides.cs
+++ b/src/Models/ThemeOverrides.cs
@@ -7,7 +7,7 @@ namespace SourceGit.Models
     public class ThemeOverrides
     {
         public Dictionary<string, Color> BasicColors { get; set; } = new Dictionary<string, Color>();
-        public double GraphPenThickness { get; set; } = 1.5;
+        public double GraphPenThickness { get; set; } = 2;
         public List<Color> GraphColors { get; set; } = new List<Color>();
     }
 }