diff --git a/server/app/Controllers/Http/MatchController.js b/server/app/Controllers/Http/MatchController.js
index 1baed55..aad5b65 100644
--- a/server/app/Controllers/Http/MatchController.js
+++ b/server/app/Controllers/Http/MatchController.js
@@ -3,8 +3,8 @@
 const Jax = use('Jax')
 const DetailedMatch = use('App/Models/DetailedMatch')
 const DetailedMatchTransformer = use('App/Transformers/DetailedMatchTransformer')
-const MatchHelper = use('App/Helpers/MatchHelper')
-const StatsHelper = use('App/Helpers/StatsHelper')
+const MatchService = use('App/Services/MatchService')
+const StatsService = use('App/Services/StatsService')
 const Summoner = use('App/Models/Summoner')
 
 class MatchController {
@@ -17,11 +17,11 @@ class MatchController {
     const gameIds = request.input('gameIds')
 
     const summonerDB = await Summoner.where({ puuid: account.puuid }).first()
-    const matches = await MatchHelper.getMatches(account, gameIds, summonerDB)
+    const matches = await MatchService.getMatches(account, gameIds, summonerDB)
 
     await summonerDB.save()
 
-    const stats = await StatsHelper.getSummonerStats(account)
+    const stats = await StatsService.getSummonerStats(account)
 
     return response.json({
       matches,
diff --git a/server/app/Controllers/Http/SummonerController.js b/server/app/Controllers/Http/SummonerController.js
index 76eb1d7..06801e8 100644
--- a/server/app/Controllers/Http/SummonerController.js
+++ b/server/app/Controllers/Http/SummonerController.js
@@ -1,8 +1,8 @@
 'use strict'
 
 const Jax = use('Jax')
-const MatchHelper = use('App/Helpers/MatchHelper')
-const StatsHelper = use('App/Helpers/StatsHelper')
+const MatchService = use('App/Services/MatchService')
+const StatsService = use('App/Services/StatsService')
 const Summoner = use('App/Models/Summoner')
 
 class SummonerController {
@@ -49,20 +49,20 @@ class SummonerController {
       }
 
       // MATCH LIST
-      await MatchHelper.updateMatchList(account, summonerDB)
+      await MatchService.updateMatchList(account, summonerDB)
       const matchList = summonerDB.matchList
       finalJSON.allMatches = matchList
 
       // MATCHES BASIC
       const gameIds = matchList.slice(0, 10).map(({ gameId }) => gameId)
-      finalJSON.matchesDetails = await MatchHelper.getMatches(account, gameIds, summonerDB)
+      finalJSON.matchesDetails = await MatchService.getMatches(account, gameIds, summonerDB)
 
       // PATCH VERSION
       finalJSON.version = Jax.DDragon.Version
 
       // STATS
       console.time('STATS')
-      finalJSON.stats = await StatsHelper.getSummonerStats(account)
+      finalJSON.stats = await StatsService.getSummonerStats(account)
       console.timeEnd('STATS')
 
       // SAVE IN DB
diff --git a/server/app/Helpers/MatchHelper.js b/server/app/Services/MatchService.js
similarity index 93%
rename from server/app/Helpers/MatchHelper.js
rename to server/app/Services/MatchService.js
index 5280dc7..9eb625c 100644
--- a/server/app/Helpers/MatchHelper.js
+++ b/server/app/Services/MatchService.js
@@ -4,13 +4,13 @@ const Logger = use('Logger')
 const Jax = use('Jax')
 const BasicMatchTransformer = use('App/Transformers/BasicMatchTransformer')
 
-class MatchHelper {
+class MatchService {
   /**
    * Add 100 matches at a time to MatchList until the stopFetching condition is true
    * @param account of the summoner
    * @param stopFetching condition to stop fetching the MatchList
    */
-  async fetchMatchListUntil(account, stopFetching) {
+  async _fetchMatchListUntil(account, stopFetching) {
     let matchList = []
     let alreadyIn = false
     let index = 0
@@ -48,7 +48,7 @@ class MatchHelper {
     // Summoner has already been searched : we already have a MatchList and we need to update it
     if (summonerDB.matchList) {
       // Get MatchList
-      const matchList = await this.fetchMatchListUntil(account, (newMatchList) => {
+      const matchList = await this._fetchMatchListUntil(account, (newMatchList) => {
         return summonerDB.matchList.some(m => m.gameId === newMatchList[newMatchList.length - 1].gameId)
       })
       // Update Summoner's MatchList
@@ -64,7 +64,7 @@ class MatchHelper {
     else {
       const today = Date.now()
       // Get MatchList
-      const matchList = await this.fetchMatchListUntil(account, (newMatchList) => {
+      const matchList = await this._fetchMatchListUntil(account, (newMatchList) => {
         return (newMatchList.length !== 100 || today - newMatchList[newMatchList.length - 1].timestamp > 10368000000)
       })
       // Create Summoner's MatchList in Database
@@ -103,7 +103,6 @@ class MatchHelper {
     if (matchesFromApi.length !== 0) {
       const ctx = {
         account,
-        MatchHelper: this
       }
       // Transform raw matches data
       await BasicMatchTransformer.transform(matchesFromApi, ctx)
@@ -126,4 +125,4 @@ class MatchHelper {
   }
 }
 
-module.exports = new MatchHelper()
+module.exports = new MatchService()
diff --git a/server/app/Helpers/StatsHelper.js b/server/app/Services/StatsService.js
similarity index 72%
rename from server/app/Helpers/StatsHelper.js
rename to server/app/Services/StatsService.js
index cea8a81..2d0420f 100644
--- a/server/app/Helpers/StatsHelper.js
+++ b/server/app/Services/StatsService.js
@@ -1,9 +1,9 @@
 'use strict'
 
-const MatchHelper = use('App/Helpers/MatchHelper')
+const Helpers = use('App/helpers')
 const MatchRepository = make('App/Repositories/MatchRepository')
 
-class StatsHelper {
+class StatsService {
   constructor() {
     this.matchRepository = MatchRepository
   }
@@ -31,22 +31,12 @@ class StatsHelper {
     return {
       global: globalStats[0],
       league: gamemodeStats,
-      role: roleStats.sort(this.sortTeamByRole),
+      role: roleStats.sort(Helpers.sortTeamByRole),
       class: championClassStats,
       mates,
       champion: championStats,
     }
   }
-
-  /**
-  * Sort array of Roles according to a specific order
-  * @param a first role
-  * @param b second role
-  */
-  sortTeamByRole(a, b) {
-    const sortingArr = ['TOP', 'JUNGLE', 'MIDDLE', 'BOTTOM', 'SUPPORT']
-    return sortingArr.indexOf(a.role) - sortingArr.indexOf(b.role)
-  }
 }
 
-module.exports = new StatsHelper()
\ No newline at end of file
+module.exports = new StatsService()
\ No newline at end of file
diff --git a/server/app/Transformers/BasicMatchTransformer.js b/server/app/Transformers/BasicMatchTransformer.js
index ef9622f..c7e22d4 100644
--- a/server/app/Transformers/BasicMatchTransformer.js
+++ b/server/app/Transformers/BasicMatchTransformer.js
@@ -62,8 +62,8 @@ class BasicMatchTransformer extends MatchTransformer {
         enemyTeam.push(playerInfos)
       }
     }
-    allyTeam.sort(super.sortTeamByRole)
-    enemyTeam.sort(super.sortTeamByRole)
+    allyTeam.sort(this.sortTeamByRole)
+    enemyTeam.sort(this.sortTeamByRole)
 
     return {
       summoner_puuid: account.puuid,
diff --git a/server/app/Transformers/DetailedMatchTransformer.js b/server/app/Transformers/DetailedMatchTransformer.js
index c5e508a..4cef473 100644
--- a/server/app/Transformers/DetailedMatchTransformer.js
+++ b/server/app/Transformers/DetailedMatchTransformer.js
@@ -74,7 +74,7 @@ class DetailedMatchTransformer extends MatchTransformer {
     // Players
     const players = teamPlayers
       .map(p => super.getPlayerData(match, p, true, teamStats))
-      .sort(super.sortTeamByRole)
+      .sort(this.sortTeamByRole)
 
     return {
       bans,
diff --git a/server/app/Transformers/MatchTransformer.js b/server/app/Transformers/MatchTransformer.js
index 307279e..fda5cf0 100644
--- a/server/app/Transformers/MatchTransformer.js
+++ b/server/app/Transformers/MatchTransformer.js
@@ -1,6 +1,7 @@
 'use strict'
 
 const Jax = use('Jax')
+const Helpers = use('App/helpers')
 
 /**
  * MatchTransformer class
@@ -16,13 +17,12 @@ class MatchTransformer {
     const champions = await Jax.CDragon.champions()
     const perks = await Jax.CDragon.perks()
     const perkstyles = await Jax.CDragon.perkstyles()
-    const version = Jax.DDragon.Version
 
     this.champions = champions
     this.items = items
     this.perks = perks
     this.perkstyles = perkstyles.styles
-    this.version = version
+    this.sortTeamByRole = Helpers.sortTeamByRole
   }
 
   /**
@@ -164,16 +164,6 @@ class MatchTransformer {
     }
     return timeline.lane
   }
-
-  /**
-  * Sort array of Roles according to a specific order
-  * @param a first role
-  * @param b second role
-  */
-  sortTeamByRole(a, b) {
-    const sortingArr = ['TOP', 'JUNGLE', 'MIDDLE', 'BOTTOM', 'SUPPORT']
-    return sortingArr.indexOf(a.role) - sortingArr.indexOf(b.role)
-  }
 }
 
 module.exports = MatchTransformer
diff --git a/server/app/helpers.js b/server/app/helpers.js
new file mode 100644
index 0000000..8448bf8
--- /dev/null
+++ b/server/app/helpers.js
@@ -0,0 +1,11 @@
+module.exports = {
+  /**
+    * Sort array of Roles according to a specific order
+    * @param a first role
+    * @param b second role
+    */
+  sortTeamByRole(a, b) {
+    const sortingArr = ['TOP', 'JUNGLE', 'MIDDLE', 'BOTTOM', 'SUPPORT']
+    return sortingArr.indexOf(a.role) - sortingArr.indexOf(b.role)
+  },
+}