diff --git a/typings/xterm.d.ts b/typings/xterm.d.ts
index 72206c82..b1cea816 100644
--- a/typings/xterm.d.ts
+++ b/typings/xterm.d.ts
@@ -41,6 +41,21 @@ interface ITerminalOptions {
    */
   disableStdin?: boolean;
 
+  /**
+   * The font size used to render text.
+   */
+  fontSize?: number;
+
+  /**
+   * The font family used to render text.
+   */
+  fontFamily?: string;
+
+  /**
+   * The line height used to render text.
+   */
+  lineHeight?: number;
+
   /**
    * The number of rows in the terminal.
    */