diff --git a/frontend/src/components/Counter.vue b/frontend/src/components/Counter.vue
index be27065..4f3f3db 100644
--- a/frontend/src/components/Counter.vue
+++ b/frontend/src/components/Counter.vue
@@ -121,13 +121,12 @@ function toggleStopping() {
   isStopping.value = !isStopping.value;
 }
 
-function switchBuff() {
-  const [buff, prevBuff] = state.switchBuff();
+function nextBuff() {
+  const [buff, prevBuff] = state.nextBuff();
   const difference = state.refs.targetDate.value - nowTime.value;
   let distance = Math.abs(difference);
   if (difference < 0) {
-    distance *= prevBuff;
-    distance /= buff;
+    distance = distance * prevBuff / buff;
     state.refs.targetDate.value = nowTime.value - distance;
   }
 }
@@ -140,7 +139,7 @@ function switchBuff() {
       <Button @click="startGame">
         <PlayIcon />
       </Button>
-      <BuffButton @click="switchBuff" />
+      <BuffButton @click="nextBuff" />
       <Button
         :disabled="state.refs.maxTime.value === MAX_MAX_TIME"
         @click="increaseMaxTime"
@@ -162,7 +161,7 @@ function switchBuff() {
         <BackwardIcon v-if="state.refs.isReverseOn.value" />
         <ForwardIcon v-else />
       </Button>
-      <BuffButton @click="switchBuff" />
+      <BuffButton @click="nextBuff" />
       <Button @click="toggleStopping">
         <StopIcon />
       </Button>
diff --git a/frontend/src/state.ts b/frontend/src/state.ts
index a9ea709..ab08b88 100644
--- a/frontend/src/state.ts
+++ b/frontend/src/state.ts
@@ -4,7 +4,7 @@ import { hoursToMilliseconds } from "@/utils";
 
 export class State {
   consts = {
-    availableBuffs: [1.00, 1.25, 1.50, 1.75, 2.00],
+    buffs: Array(1 / 0.05 + 1).fill(undefined).map((_, i) => 1 + Math.round(0.05 * i * 100) / 100),
   };
 
   refs = {
@@ -16,14 +16,14 @@ export class State {
 
   computed = {
     buff: computed(() => {
-      return this.consts.availableBuffs[this.refs.buffIndex.value]!;
+      return this.consts.buffs[this.refs.buffIndex.value]!;
     }),
   };
 
-  switchBuff(): [number, number] {
-    const prevBuff = this.consts.availableBuffs[this.refs.buffIndex.value]!;
-    this.refs.buffIndex.value = (this.refs.buffIndex.value + 1) % this.consts.availableBuffs.length;
-    const buff = this.consts.availableBuffs[this.refs.buffIndex.value]!;
+  nextBuff(): [number, number] {
+    const prevBuff = this.consts.buffs[this.refs.buffIndex.value]!;
+    this.refs.buffIndex.value = (this.refs.buffIndex.value + 1) % this.consts.buffs.length;
+    const buff = this.consts.buffs[this.refs.buffIndex.value]!;
     return [buff, prevBuff];
   }