diff --git a/src/main/viz/GenomeTrack.js b/src/main/viz/GenomeTrack.js
index edcd392b..3f98393d 100644
--- a/src/main/viz/GenomeTrack.js
+++ b/src/main/viz/GenomeTrack.js
@@ -121,7 +121,7 @@ class GenomeTrack extends React.Component<VizProps<TwoBitSource>, State> {
   }
 
   render(): any {
-    return <canvas ref= {this.ref}/>;
+    return <canvas ref={this.ref}/>;
   }
 
   componentDidMount() {
diff --git a/src/main/viz/IdiogramTrack.js b/src/main/viz/IdiogramTrack.js
index b739d053..d102f4d4 100644
--- a/src/main/viz/IdiogramTrack.js
+++ b/src/main/viz/IdiogramTrack.js
@@ -46,7 +46,7 @@ class IdiogramTrack extends React.Component<VizProps<DataSource<Chromosome>>, St
   }
 
   render(): any {
-    return <canvas ref = {this.ref} />;
+    return <canvas ref={this.ref} />;
   }
 
   componentDidMount() {