diff --git a/server/src/challenge-actions/challenge-actions.service.ts b/server/src/challenge-actions/challenge-actions.service.ts
index c5db157..2a4ddd9 100644
--- a/server/src/challenge-actions/challenge-actions.service.ts
+++ b/server/src/challenge-actions/challenge-actions.service.ts
@@ -6,6 +6,7 @@ import { PrismaService } from 'src/prisma/prisma.service'
 import { QueryPaginationDto } from 'src/common/dto/pagination-query.dto'
 import { paginate } from 'src/common/utils/pagination.utils'
 import { FilterChallengeActionsDto } from './dto/filter-challenge-action.dto'
+import { Constants } from 'src/common/utils/constants.utils'
 
 @Injectable()
 export class ChallengeActionsService {
@@ -87,7 +88,7 @@ export class ChallengeActionsService {
         active: false,
         end: now,
         penaltyStart: now,
-        penaltyEnd: new Date(now.getTime() + 30 * 60 * 1000),
+        penaltyEnd: new Date(now.getTime() + Constants.PENALTY_TIME * 60 * 1000),
       }
     }
     return await this.prisma.challengeAction.update({
diff --git a/server/src/common/utils/constants.utils.ts b/server/src/common/utils/constants.utils.ts
new file mode 100644
index 0000000..2b33419
--- /dev/null
+++ b/server/src/common/utils/constants.utils.ts
@@ -0,0 +1,21 @@
+export const Constants = {
+  /**
+   * Nombre de points attribués au début de la partie
+   */
+  INITIAL_MONEY: 2000,
+
+  /**
+   * Nombre de points attribués lors d'une nouvelle tentative
+   */
+  NEW_RUN_MONEY: 300,
+
+  /**
+   * Nombre de points requis pour l'achat d'un train par kilomètre (arrondi au supérieur)
+   */
+  PRICE_PER_KILOMETER: 10,
+
+  /**
+   * Temps de pénalité en minutes en cas d'échec d'un défi
+   */
+  PENALTY_TIME: 30,
+}
diff --git a/server/src/game/game.service.ts b/server/src/game/game.service.ts
index e83330e..783256c 100644
--- a/server/src/game/game.service.ts
+++ b/server/src/game/game.service.ts
@@ -2,6 +2,7 @@ import { ConflictException, Injectable } from '@nestjs/common'
 import { Game, MoneyUpdate, MoneyUpdateType } from '@prisma/client'
 import { PrismaService } from 'src/prisma/prisma.service'
 import { RepairGame } from './dto/repair-game.dto'
+import { Constants } from 'src/common/utils/constants.utils'
 
 @Injectable()
 export class GameService {
@@ -23,7 +24,7 @@ export class GameService {
         await this.prisma.moneyUpdate.create({
           data: {
             playerId: player.id,
-            amount: 2000,
+            amount: Constants.INITIAL_MONEY,
             reason: MoneyUpdateType.START,
           }
         })
@@ -87,7 +88,7 @@ export class GameService {
       await this.prisma.moneyUpdate.create({
         data: {
           playerId: newRunnerId,
-          amount: 300,
+          amount: Constants.NEW_RUN_MONEY,
           reason: MoneyUpdateType.NEW_RUN,
           runId: newRun.id,
         }
@@ -139,7 +140,7 @@ export class GameService {
         const trainMoneyUpdate = await this.prisma.moneyUpdate.create({
           data: {
             playerId: train.playerId,
-            amount: -10 * Math.ceil(train.distance / 1000),
+            amount: -Constants.PRICE_PER_KILOMETER * Math.ceil(train.distance / 1000),
             reason: MoneyUpdateType.BUY_TRAIN,
             tripId: train.id,
           }
diff --git a/server/src/trains/trains.service.ts b/server/src/trains/trains.service.ts
index f000147..38cf3b3 100644
--- a/server/src/trains/trains.service.ts
+++ b/server/src/trains/trains.service.ts
@@ -9,6 +9,7 @@ import { ImportTrainDto } from './dto/import-train.dto'
 import { InterrailJourney, InterrailLegInfo, InterrailTravelInfo } from './dto/interrail-api.dto'
 import { distanceCoordinates } from 'src/common/utils/calculus.utils'
 import { PlayerFilterDto } from 'src/common/dto/player_filter.dto'
+import { Constants } from 'src/common/utils/constants.utils'
 
 @Injectable()
 export class TrainsService {
@@ -87,7 +88,7 @@ export class TrainsService {
           const oldCoordinates = legInfoJson.trainStopStations.at(index - 1).coordinates
           return distance + distanceCoordinates({ from: oldCoordinates, to: coordinates })
         }, 0)
-    const cost = 10 * 10 * Math.ceil(distance / 1000)
+    const cost = Constants.PRICE_PER_KILOMETER * Math.ceil(distance / 1000)
 
     const train = await this.prisma.trainTrip.create({
       data: {