diff --git a/src/app/graph.rs b/src/app/graph.rs
index cdbd212..c16fe56 100644
--- a/src/app/graph.rs
+++ b/src/app/graph.rs
@@ -27,7 +27,7 @@ impl Graph {
 
     pub fn update(&mut self, value: f32) {
         self.timeline.push_back(value);
-        if self.timeline.len() > 500 {
+        if self.timeline.len() > 1000 {
             self.timeline.pop_front();
         }
     }
@@ -53,7 +53,7 @@ impl canvas::Program<app::Message, Theme, Renderer> for Graph {
                 &canvas::Path::new(|builder| {
                     for (index, value) in self.timeline.iter().enumerate() {
                         let x = index as f32 / self.timeline.len() as f32 * bounds.width;
-                        let y = bounds.height - value / 100. * bounds.height - 1.;
+                        let y = bounds.height - value / 100. * bounds.height;
                         builder.line_to(Point::new(x, y))
                     }
                 }),