diff --git a/optuna_dashboard/ts/components/TrialFormWidgets.tsx b/optuna_dashboard/ts/components/TrialFormWidgets.tsx
index 14609fe5..9b9c2fea 100644
--- a/optuna_dashboard/ts/components/TrialFormWidgets.tsx
+++ b/optuna_dashboard/ts/components/TrialFormWidgets.tsx
@@ -144,6 +144,7 @@ const UpdatableFormWidgets: FC<{
           marginBottom: theme.spacing(2),
           margin: theme.spacing(0, 1, 1, 0),
           p: theme.spacing(1),
+          maxWidth: "1000px",
         }}
       >
         {widgetStates.map((ws) => ws.render())}
@@ -385,6 +386,7 @@ const ReadonlyFormWidgets: FC<{
           marginBottom: theme.spacing(2),
           margin: theme.spacing(0, 1, 1, 0),
           p: theme.spacing(1),
+          maxWidth: "1000px",
         }}
       >
         {formWidgets.widgets.map((widget, i) => {
diff --git a/optuna_dashboard/ts/components/TrialList.tsx b/optuna_dashboard/ts/components/TrialList.tsx
index 9f7a07bf..ce62be66 100644
--- a/optuna_dashboard/ts/components/TrialList.tsx
+++ b/optuna_dashboard/ts/components/TrialList.tsx
@@ -226,7 +226,6 @@ const TrialListDetail: FC<{
               ? "rgba(255, 255, 255, 0.05)"
               : "rgba(0, 0, 0, 0.05)",
           width: "100%",
-          maxWidth: "1000px",
           maxHeight: "150px",
           overflow: "auto",
           p: theme.spacing(0.5, 1),