diff --git a/src/vs/base/browser/ui/selectBox/selectBoxCustom.ts b/src/vs/base/browser/ui/selectBox/selectBoxCustom.ts
index 1d29e9a3c0095..ae0ecb88eb6e1 100644
--- a/src/vs/base/browser/ui/selectBox/selectBoxCustom.ts
+++ b/src/vs/base/browser/ui/selectBox/selectBoxCustom.ts
@@ -367,7 +367,7 @@ export class SelectBoxList extends Disposable implements ISelectBoxDelegate, ILi
 			content.push(`.monaco-select-box-dropdown-container > .select-box-dropdown-list-container .monaco-list .monaco-list-row.option-disabled:hover { outline: none !important; }`);
 		}
 
-		this.styleElement.innerHTML = content.join('\n');
+		this.styleElement.textContent = content.join('\n');
 
 		this.applyStyles();
 	}
@@ -680,7 +680,7 @@ export class SelectBoxList extends Disposable implements ISelectBoxDelegate, ILi
 			});
 
 
-			container.innerHTML = this.options[longest].text + (!!this.options[longest].decoratorRight ? (this.options[longest].decoratorRight + ' ') : '');
+			container.textContent = this.options[longest].text + (!!this.options[longest].decoratorRight ? (this.options[longest].decoratorRight + ' ') : '');
 			elementWidth = dom.getTotalWidth(container);
 		}
 
diff --git a/src/vs/workbench/contrib/debug/browser/repl.ts b/src/vs/workbench/contrib/debug/browser/repl.ts
index 7aa395b1c9b64..3a9393d334052 100644
--- a/src/vs/workbench/contrib/debug/browser/repl.ts
+++ b/src/vs/workbench/contrib/debug/browser/repl.ts
@@ -306,7 +306,7 @@ export class Repl extends ViewPane implements IHistoryNavigationWidget {
 			const replInputLineHeight = this.replInput.getOption(EditorOption.lineHeight);
 
 			// Set the font size, font family, line height and align the twistie to be centered, and input theme color
-			this.styleElement.innerHTML = `
+			this.styleElement.textContent = `
 				.repl .repl-tree .expression {
 					font-size: ${fontSize}px;
 					font-family: ${fontFamily};