diff --git a/demo/client/components/window/testWindow.ts b/demo/client/components/window/testWindow.ts
index e811ce7866..12c6e99541 100644
--- a/demo/client/components/window/testWindow.ts
+++ b/demo/client/components/window/testWindow.ts
@@ -671,7 +671,9 @@ function sgrTest(term: Terminal): void {
     { ps: 47, name: 'Background White' },
     { ps: 49, name: 'Background default' },
     { ps: 53, name: 'Overlined' },
-    { ps: 55, name: 'Not overlined' }
+    { ps: 55, name: 'Not overlined' },
+    { ps: 221, name: 'Not bold (kitty)' },
+    { ps: 222, name: 'Not faint (kitty)' }
   ];
   const maxNameLength = entries.reduce<number>((p, c) => Math.max(c.name.length, p), 0);
   for (const e of entries) {
@@ -684,7 +686,9 @@ function sgrTest(term: Terminal): void {
   const comboEntries: { ps: number[] }[] = [
     { ps: [1, 2, 3, 4, 5, 6, 7, 9] },
     { ps: [2, 41] },
-    { ps: [4, 53] }
+    { ps: [4, 53] },
+    { ps: [1, 2, 221] },
+    { ps: [1, 2, 222] }
   ];
   term.write('\n\n\r');
   term.writeln(`Combinations`);
diff --git a/src/common/InputHandler.test.ts b/src/common/InputHandler.test.ts
index ee12e9a061..751cfcf18d 100644
--- a/src/common/InputHandler.test.ts
+++ b/src/common/InputHandler.test.ts
@@ -716,6 +716,22 @@ describe('InputHandler', () => {
       await inputHandler.parseP('\x1b[22m');
       assert.equal(!!inputHandler.curAttrData.isDim(), false);
     });
+    it('SGR 221 resets bold only (kitty)', async () => {
+      await inputHandler.parseP('\x1b[1;2m');
+      assert.equal(!!inputHandler.curAttrData.isBold(), true);
+      assert.equal(!!inputHandler.curAttrData.isDim(), true);
+      await inputHandler.parseP('\x1b[221m');
+      assert.equal(!!inputHandler.curAttrData.isBold(), false);
+      assert.equal(!!inputHandler.curAttrData.isDim(), true);
+    });
+    it('SGR 222 resets faint only (kitty)', async () => {
+      await inputHandler.parseP('\x1b[1;2m');
+      assert.equal(!!inputHandler.curAttrData.isBold(), true);
+      assert.equal(!!inputHandler.curAttrData.isDim(), true);
+      await inputHandler.parseP('\x1b[222m');
+      assert.equal(!!inputHandler.curAttrData.isBold(), true);
+      assert.equal(!!inputHandler.curAttrData.isDim(), false);
+    });
     it('italic', async () => {
       await inputHandler.parseP('\x1b[3m');
       assert.equal(!!inputHandler.curAttrData.isItalic(), true);
diff --git a/src/common/InputHandler.ts b/src/common/InputHandler.ts
index f816e1141c..3076ed8a9e 100644
--- a/src/common/InputHandler.ts
+++ b/src/common/InputHandler.ts
@@ -2520,6 +2520,8 @@ export class InputHandler extends Disposable implements IInputHandler {
    * | 53        | Overlined.                                               | #Y      |
    * | 55        | Not Overlined.                                           | #Y      |
    * | 58        | Underline color: Extended color.                         | #P[Support for RGB and indexed colors, see below.] |
+   * | 221       | Not bold (kitty extension).                              | #Y      |
+   * | 222       | Not faint (kitty extension).                             | #Y      |
    * | 90 - 97   | Bright foreground color (analogous to 30 - 37).          | #Y      |
    * | 100 - 107 | Bright background color (analogous to 40 - 47).          | #Y      |
    *
@@ -2652,6 +2654,12 @@ export class InputHandler extends Disposable implements IInputHandler {
       } else if (p === 55) {
         // not overline
         attr.bg &= ~BgFlags.OVERLINE;
+      } else if (p === 221) {
+        // not bold (kitty extension)
+        attr.fg &= ~FgFlags.BOLD;
+      } else if (p === 222) {
+        // not faint (kitty extension)
+        attr.bg &= ~BgFlags.DIM;
       } else if (p === 59) {
         attr.extended = attr.extended.clone();
         attr.extended.underlineColor = -1;