diff --git a/optuna_dashboard/ts/components/GraphSlice.tsx b/optuna_dashboard/ts/components/GraphSlice.tsx
index 7386ee94..39082eb4 100644
--- a/optuna_dashboard/ts/components/GraphSlice.tsx
+++ b/optuna_dashboard/ts/components/GraphSlice.tsx
@@ -187,9 +187,7 @@ const plotSlice = (
     return t.params.find((p) => p.name == selected)!.value
   })
 
-  const trialNumbers: number[] = filteredTrials.map(
-    (t) => t.number as number
-  )
+  const trialNumbers: number[] = filteredTrials.map((t) => t.number as number)
 
   const isnum = valueStrings.every((v) => {
     return !isNaN(Number(v))
@@ -204,7 +202,7 @@ const plotSlice = (
         mode: "markers",
         marker: {
           color: trialNumbers,
-          colorscale: 'Blues',
+          colorscale: "Blues",
           reversescale: true,
           colorbar: {
             title: "Trial",
@@ -238,7 +236,7 @@ const plotSlice = (
         mode: "markers",
         marker: {
           color: trialNumbers,
-          colorscale: 'Blues',
+          colorscale: "Blues",
           reversescale: true,
           colorbar: {
             title: "Trial",