diff --git a/src/main/kotlin/fr/postgresjson/connexion/Requester.kt b/src/main/kotlin/fr/postgresjson/connexion/Requester.kt
index 7629575..72d04ba 100644
--- a/src/main/kotlin/fr/postgresjson/connexion/Requester.kt
+++ b/src/main/kotlin/fr/postgresjson/connexion/Requester.kt
@@ -87,21 +87,11 @@ class Requester(
         }
 
         private fun initRequester(req: Requester): Requester {
-            if (queriesDirectory === null) {
-                val resource = this::class.java.getResource("/sql/query")
-                if (resource !== null) {
-                    req.addQuery(File(resource.toURI()))
-                }
-            } else {
+            if (queriesDirectory !== null) {
                 req.addQuery(queriesDirectory)
             }
 
-            if (functionsDirectory === null) {
-                val resource = this::class.java.getResource("/sql/function")
-                if (resource !== null) {
-                    req.addFunction(File(resource.toURI()))
-                }
-            } else {
+            if (functionsDirectory !== null) {
                 req.addFunction(functionsDirectory)
             }
 
diff --git a/src/main/kotlin/fr/postgresjson/migration/Function.kt b/src/main/kotlin/fr/postgresjson/migration/Function.kt
index a5689c1..5efd2ec 100644
--- a/src/main/kotlin/fr/postgresjson/migration/Function.kt
+++ b/src/main/kotlin/fr/postgresjson/migration/Function.kt
@@ -3,7 +3,6 @@ package fr.postgresjson.migration
 import fr.postgresjson.connexion.Connection
 import fr.postgresjson.migration.Migration.Action
 import fr.postgresjson.migration.Migration.Status
-import java.io.File
 import java.util.*
 import fr.postgresjson.definition.Function as DefinitionFunction
 
@@ -35,10 +34,10 @@ data class Function(
     )
 
     override fun up(): Status {
-        connection.exec(up.script)
+        connection.sendQuery(up.script)
 
-        File(this::class.java.getResource("/sql/migration/insertFunction.sql").toURI()).let {
-            connection.selectOne<MigrationEntity>(it.readText(), listOf(up))?.let { function ->
+        this::class.java.classLoader.getResource("sql/migration/insertFunction.sql")!!.readText().let {
+            connection.selectOne<MigrationEntity>(it, listOf(up))?.let { function ->
                 executedAt = function.executedAt
                 doExecute = Action.OK
             }
@@ -47,10 +46,10 @@ data class Function(
     }
 
     override fun down(): Status {
-        connection.exec(down.script)
+        connection.sendQuery(down.script)
 
-        File(this::class.java.getResource("/sql/migration/deleteFunction.sql").toURI()).let {
-            connection.exec(it.readText(), listOf(down))
+        this::class.java.classLoader.getResource("sql/migration/deleteFunction.sql")!!.readText().let {
+            connection.exec(it, listOf(down))
         }
         return Status.OK
     }
diff --git a/src/main/kotlin/fr/postgresjson/migration/Migrations.kt b/src/main/kotlin/fr/postgresjson/migration/Migrations.kt
index 96923ef..230dfb9 100644
--- a/src/main/kotlin/fr/postgresjson/migration/Migrations.kt
+++ b/src/main/kotlin/fr/postgresjson/migration/Migrations.kt
@@ -1,7 +1,9 @@
 package fr.postgresjson.migration
 
+import com.fasterxml.jackson.core.type.TypeReference
 import com.github.jasync.sql.db.util.size
 import fr.postgresjson.connexion.Connection
+import fr.postgresjson.definition.Function.FunctionNotFound
 import fr.postgresjson.entity.Entity
 import fr.postgresjson.migration.Migration.Action
 import fr.postgresjson.migration.Migration.Status
@@ -58,15 +60,15 @@ data class Migrations private constructor(
      * Get all migration from DB
      */
     private fun getMigrationFromDB() {
-        File(this::class.java.getResource("/sql/migration/findAllFunction.sql").toURI()).let {
-            connection.select<MigrationEntity>(it.readText())
+        this::class.java.classLoader.getResource("sql/migration/findAllFunction.sql")!!.readText().let {
+            connection.select<MigrationEntity>(it, object: TypeReference<List<MigrationEntity>>() {})
                 .map { function ->
                     functions[function.filename] = Function(function.up, function.down, connection, function.executedAt)
                 }
         }
 
-        File(this::class.java.getResource("/sql/migration/findAllHistory.sql").toURI()).let {
-            connection.select<MigrationEntity>(it.readText())
+        this::class.java.classLoader.getResource("sql/migration/findAllHistory.sql")!!.readText().let {
+            connection.select<MigrationEntity>(it, object: TypeReference<List<MigrationEntity>>() {})
                 .map { query ->
                     queries[query.filename] = Query(query.filename, query.up, query.down, connection, query.executedAt)
                 }
@@ -78,27 +80,27 @@ data class Migrations private constructor(
      */
     private fun getMigrationFromDirectory(directory: File) {
         directory.walk().filter {
-            it.isDirectory
-        }.forEach { subDirectory ->
-            subDirectory.walk().filter {
-                it.isFile
-            }.forEach { file ->
-                if (file.name.endsWith(".up.sql")) {
-                    file.path.substring(0, file.path.size - 7).let {
-                        try {
-                            val down = File("$it.down.sql").readText()
-                            val up = file.readText()
-                            val name = file.name.substring(0, file.name.size - 7)
-                            addQuery(name, up, down)
-                        } catch (e: FileNotFoundException) {
-                            throw DownMigrationNotDefined("$it.down.sql", e)
-                        }
+            it.isFile
+        }.forEach { file ->
+            if (file.name.endsWith(".up.sql")) {
+                file.path.substring(0, file.path.size - 7).let {
+                    try {
+                        val down = File("$it.down.sql").readText()
+                        val up = file.readText()
+                        val name = file.name.substring(0, file.name.size - 7)
+                        addQuery(name, up, down)
+                    } catch (e: FileNotFoundException) {
+                        throw DownMigrationNotDefined("$it.down.sql", e)
                     }
-                } else if (file.name.endsWith(".down.sql")) {
-                    // Nothing
-                } else {
-                    val fileContent = file.readText()
+                }
+            } else if (file.name.endsWith(".down.sql")) {
+                // Nothing
+            } else {
+                val fileContent = file.readText()
+                try {
                     addFunction(fileContent)
+                } catch(e: FunctionNotFound) {
+                    // Nothing
                 }
             }
         }
@@ -153,19 +155,19 @@ data class Migrations private constructor(
 
     private fun initDB() {
         if (!initialized) {
-            File(this::class.java.getResource("/sql/migration/createHistoryShema.sql").toURI()).let {
-                connection.sendQuery(it.readText())
+            this::class.java.classLoader.getResource("sql/migration/createHistoryShema.sql")!!.readText().let {
+                connection.sendQuery(it)
             }
-            File(this::class.java.getResource("/sql/migration/createFunctionShema.sql").toURI()).let {
-                connection.sendQuery(it.readText())
+            this::class.java.classLoader.getResource("sql/migration/createFunctionShema.sql")!!.readText().let {
+                connection.sendQuery(it)
             }
             initialized = true
         }
     }
 
     private fun lock() {
-        File(this::class.java.getResource("/sql/migration/lockMigrationTables.sql").toURI()).let {
-            connection.sendQuery(it.readText())
+        this::class.java.classLoader.getResource("sql/migration/lockMigrationTables.sql")!!.readText().let {
+            connection.sendQuery(it)
         }
     }
 
diff --git a/src/main/kotlin/fr/postgresjson/migration/Query.kt b/src/main/kotlin/fr/postgresjson/migration/Query.kt
index bc3ec68..673d994 100644
--- a/src/main/kotlin/fr/postgresjson/migration/Query.kt
+++ b/src/main/kotlin/fr/postgresjson/migration/Query.kt
@@ -3,7 +3,6 @@ package fr.postgresjson.migration
 import fr.postgresjson.connexion.Connection
 import fr.postgresjson.entity.Entity
 import fr.postgresjson.migration.Migration.Action
-import java.io.File
 import java.util.*
 
 data class Query(
@@ -16,10 +15,10 @@ data class Query(
     override var doExecute: Action? = null
 
     override fun up(): Migration.Status {
-        connection.exec(up)
+        connection.sendQuery(up)
 
-        File(this::class.java.getResource("/sql/migration/insertHistory.sql").toURI()).let {
-            connection.selectOne<MigrationEntity>(it.readText(), listOf(name, up, down))?.let { query ->
+        this::class.java.classLoader.getResource("sql/migration/insertHistory.sql")!!.readText().let {
+            connection.selectOne<MigrationEntity>(it, listOf(name, up, down))?.let { query ->
                 executedAt = query.executedAt
                 doExecute = Action.OK
             }
@@ -29,10 +28,10 @@ data class Query(
     }
 
     override fun down(): Migration.Status {
-        connection.exec(down)
+        connection.sendQuery(down)
 
-        File(this::class.java.getResource("/sql/migration/deleteHistory.sql").toURI()).let {
-            connection.exec(it.readText(), listOf(name))
+        this::class.java.classLoader.getResource("sql/migration/deleteHistory.sql")!!.readText().let {
+            connection.exec(it, listOf(name))
         }
 
         return Migration.Status.OK
diff --git a/src/test/kotlin/fr/postgresjson/MigrationTest.kt b/src/test/kotlin/fr/postgresjson/MigrationTest.kt
index 860b5da..7420f8e 100644
--- a/src/test/kotlin/fr/postgresjson/MigrationTest.kt
+++ b/src/test/kotlin/fr/postgresjson/MigrationTest.kt
@@ -32,18 +32,6 @@ class MigrationTest(): TestAbstract() {
         } shouldThrow Migrations.DownMigrationNotDefined::class
     }
 
-    @Test
-    fun `run forced down query`() {
-        val resources = File(this::class.java.getResource("/sql/migrations").toURI())
-        val m = Migrations(resources, getConnextion())
-        repeat(3) {
-            m.down(true).apply {
-                this `should contain` Pair("1", Migration.Status.OK)
-                size `should be equal to` 1
-            }
-        }
-    }
-
     @Test
     fun `run dry migrations`() {
         val resources = File(this::class.java.getResource("/sql/real_migrations").toURI())
@@ -77,6 +65,11 @@ class MigrationTest(): TestAbstract() {
     @Test
     fun `run migrations force down`() {
         val resources = File(this::class.java.getResource("/sql/real_migrations").toURI())
+        Migrations(resources, getConnextion()).apply {
+            up().apply {
+                size `should be equal to` 1
+            }
+        }
         Migrations(resources, getConnextion()).apply {
             forceAllDown().apply {
                 size `should be equal to` 1