diff --git a/packages/client/src/components/mfm.ts b/packages/client/src/components/mfm.ts
index 37076652f..6ac410762 100644
--- a/packages/client/src/components/mfm.ts
+++ b/packages/client/src/components/mfm.ts
@@ -91,7 +91,8 @@ export default defineComponent({
 					let style;
 					switch (token.props.name) {
 						case 'tada': {
-							style = `font-size: 150%;` + (this.$store.state.animatedMfm ? 'animation: tada 1s linear infinite both;' : '');
+							const speed = validTime(token.props.args.speed) || '1s';
+							style = 'font-size: 150%;' + (this.$store.state.animatedMfm ? `animation: tada ${speed} linear infinite both;` : '');
 							break;
 						}
 						case 'jelly': {
@@ -123,11 +124,13 @@ export default defineComponent({
 							break;
 						}
 						case 'jump': {
-							style = this.$store.state.animatedMfm ? 'animation: mfm-jump 0.75s linear infinite;' : '';
+							const speed = validTime(token.props.args.speed) || '0.75s';
+							style = this.$store.state.animatedMfm ? `animation: mfm-jump ${speed} linear infinite;` : '';
 							break;
 						}
 						case 'bounce': {
-							style = this.$store.state.animatedMfm ? 'animation: mfm-bounce 0.75s linear infinite; transform-origin: center bottom;' : '';
+							const speed = validTime(token.props.args.speed) || '0.75s';
+							style = this.$store.state.animatedMfm ? `animation: mfm-bounce ${speed} linear infinite; transform-origin: center bottom;` : '';
 							break;
 						}
 						case 'flip': {
@@ -168,7 +171,8 @@ export default defineComponent({
 							}, genEl(token.children));
 						}
 						case 'rainbow': {
-							style = this.$store.state.animatedMfm ? 'animation: mfm-rainbow 1s linear infinite;' : '';
+							const speed = validTime(token.props.args.speed) || '1s';
+							style = this.$store.state.animatedMfm ? `animation: mfm-rainbow ${speed} linear infinite;` : '';
 							break;
 						}
 						case 'sparkle': {
diff --git a/packages/client/src/pages/mfm-cheat-sheet.vue b/packages/client/src/pages/mfm-cheat-sheet.vue
index 83ae5741c..aa35ec215 100644
--- a/packages/client/src/pages/mfm-cheat-sheet.vue
+++ b/packages/client/src/pages/mfm-cheat-sheet.vue
@@ -325,20 +325,20 @@ export default defineComponent({
 			preview_inlineMath: '\\(x= \\frac{-b\' \\pm \\sqrt{(b\')^2-ac}}{a}\\)',
 			preview_quote: `> ${this.$ts._mfm.dummy}`,
 			preview_search: `${this.$ts._mfm.dummy} 検索`,
-			preview_jelly: `$[jelly 🍮]`,
-			preview_tada: `$[tada 🍮]`,
-			preview_jump: `$[jump 🍮]`,
-			preview_bounce: `$[bounce 🍮]`,
-			preview_shake: `$[shake 🍮]`,
-			preview_twitch: `$[twitch 🍮]`,
-			preview_spin: `$[spin 🍮] $[spin.left 🍮] $[spin.alternate 🍮]\n$[spin.x 🍮] $[spin.x,left 🍮] $[spin.x,alternate 🍮]\n$[spin.y 🍮] $[spin.y,left 🍮] $[spin.y,alternate 🍮]`,
+			preview_jelly: `$[jelly 🍮] $[jelly.speed=5s 🍮]`,
+			preview_tada: `$[tada 🍮] $[tada.speed=5s 🍮]`,
+			preview_jump: `$[jump 🍮] $[jump.speed=5s 🍮]`,
+			preview_bounce: `$[bounce 🍮] $[bounce.speed=5s 🍮]`,
+			preview_shake: `$[shake 🍮] $[shake.speed=5s 🍮]`,
+			preview_twitch: `$[twitch 🍮] $[twitch.speed=5s 🍮]`,
+			preview_spin: `$[spin 🍮] $[spin.left 🍮] $[spin.alternate 🍮]\n$[spin.x 🍮] $[spin.x,left 🍮] $[spin.x,alternate 🍮]\n$[spin.y 🍮] $[spin.y,left 🍮] $[spin.y,alternate 🍮]\n\n$[spin.speed=5s 🍮]`,
 			preview_flip: `$[flip ${this.$ts._mfm.dummy}]\n$[flip.v ${this.$ts._mfm.dummy}]\n$[flip.h,v ${this.$ts._mfm.dummy}]`,
 			preview_font: `$[font.serif ${this.$ts._mfm.dummy}]\n$[font.monospace ${this.$ts._mfm.dummy}]\n$[font.cursive ${this.$ts._mfm.dummy}]\n$[font.fantasy ${this.$ts._mfm.dummy}]`,
 			preview_x2: `$[x2 🍮]`,
 			preview_x3: `$[x3 🍮]`,
 			preview_x4: `$[x4 🍮]`,
 			preview_blur: `$[blur ${this.$ts._mfm.dummy}]`,
-			preview_rainbow: `$[rainbow 🍮]`,
+			preview_rainbow: `$[rainbow 🍮] $[rainbow.speed=5s 🍮]`,
 			preview_sparkle: `$[sparkle 🍮]`,
 			preview_rotate: `$[rotate 🍮]`,
 		}