diff --git a/tensorboard/webapp/widgets/dropdown/dropdown_component.scss b/tensorboard/webapp/widgets/dropdown/dropdown_component.scss
index 516fad2bfc..1d0b7c1b18 100644
--- a/tensorboard/webapp/widgets/dropdown/dropdown_component.scss
+++ b/tensorboard/webapp/widgets/dropdown/dropdown_component.scss
@@ -32,8 +32,9 @@ mat-select:focus {
   max-width: 70vw;
 }
 
-.tb-mat-option {
-  // Overrides Angular Material's fixed height.
+// This selector needs relatively more specificity than Angular Material's
+// to override the fixed height.
+::ng-deep mat-option.mat-option {
   height: auto;
 }
 
diff --git a/tensorboard/webapp/widgets/dropdown/dropdown_component.ts b/tensorboard/webapp/widgets/dropdown/dropdown_component.ts
index 2bb7238523..64a71eb2c2 100644
--- a/tensorboard/webapp/widgets/dropdown/dropdown_component.ts
+++ b/tensorboard/webapp/widgets/dropdown/dropdown_component.ts
@@ -35,7 +35,6 @@ export interface DropdownOption {
     >
       <mat-option
         *ngFor="let option of options"
-        class="tb-mat-option"
         [value]="option.value"
         [disabled]="option.disabled"
       >