diff --git a/frontend/frontend.js b/frontend/frontend.js
index 17f562d..528a585 100644
--- a/frontend/frontend.js
+++ b/frontend/frontend.js
@@ -35,6 +35,9 @@ function graphSpectralData(obj, dom) {
         label: 'Spectrometer data',
         data: Object.values(obj[0])
       }]
+    },
+    options: {
+      responsive: false
     }
   });
 }
diff --git a/frontend/index.html b/frontend/index.html
index 742faf2..659de60 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -17,7 +17,7 @@
     <button id="update" class="btn btn-primary m-1 float-right">Get data</button>
     <p id="debug">
     </p>
-    <canvas id="spectrogram" width="480px" height="480px"></canvas>
+    <canvas id="spectrogram" width="640px" height="480"></canvas>
     <table class="table table-sm">
       <thead class="thead-dark">
         <tr>