diff --git a/webapp/sources/rudder/rudder-core/src/main/resources/reportsSchema.sql b/webapp/sources/rudder/rudder-core/src/main/resources/reportsSchema.sql
index 33a4b7e5d6..dad9d3af37 100644
--- a/webapp/sources/rudder/rudder-core/src/main/resources/reportsSchema.sql
+++ b/webapp/sources/rudder/rudder-core/src/main/resources/reportsSchema.sql
@@ -455,18 +455,20 @@ CREATE TABLE NodeFacts (
 );
 
 
+CREATE TYPE score AS enum ('A', 'B', 'C', 'D', 'E')
+
 Create table GlobalScore (
   nodeId  text primary key
-, score   text
-, message text
-, details jsonb
+, score   score  NOT NULL
+, message text  NOT NULL
+, details jsonb  NOT NULL
 );
 
 Create table scoreDetails (
-  nodeId  text
-, scoreId    text
-, score   text
-, message text
-, details jsonb
+  nodeId  text NOT NULL
+, scoreId text NOT NULL
+, score   score NOT NULL
+, message text NOT NULL
+, details jsonb NOT NULL
 , PRIMARY KEY (nodeId, scoreId)
 );
\ No newline at end of file
diff --git a/webapp/sources/rudder/rudder-core/src/main/scala/com/normation/rudder/score/GlobalScoreRepository.scala b/webapp/sources/rudder/rudder-core/src/main/scala/com/normation/rudder/score/GlobalScoreRepository.scala
index 68b7340c80..1f20120020 100644
--- a/webapp/sources/rudder/rudder-core/src/main/scala/com/normation/rudder/score/GlobalScoreRepository.scala
+++ b/webapp/sources/rudder/rudder-core/src/main/scala/com/normation/rudder/score/GlobalScoreRepository.scala
@@ -42,6 +42,8 @@ import com.normation.inventory.domain.NodeId
 import com.normation.rudder.db.Doobie
 import doobie.implicits._
 import doobie.implicits.toSqlInterpolator
+import doobie.postgres.implicits.pgEnumString
+import doobie.util.invariant.InvalidEnum
 import zio.interop.catz._
 
 trait GlobalScoreRepository {
@@ -56,8 +58,17 @@ object GlobalScoreRepositoryImpl {
   import ScoreSerializer._
   import com.normation.rudder.db.json.implicits._
   import doobie._
-  implicit val getScoreValue: Get[ScoreValue] = Get[String].temap(ScoreValue.fromString)
-  implicit val putScoreValue: Put[ScoreValue] = Put[String].contramap(_.value)
+
+  implicit val scoreMeta: Meta[ScoreValue] = {
+    def getValue(value: String) = {
+      ScoreValue.fromString(value) match {
+        case Right(s)  => s
+        case Left(err) => throw InvalidEnum[ScoreValue](value)
+      }
+    }
+
+    pgEnumString("score", getValue, _.value)
+  }
 
   implicit val stateWrite: Meta[List[NoDetailsScore]] = new Meta(pgDecoderGet, pgEncoderPut)
 
diff --git a/webapp/sources/rudder/rudder-core/src/main/scala/com/normation/rudder/score/ScoreRepository.scala b/webapp/sources/rudder/rudder-core/src/main/scala/com/normation/rudder/score/ScoreRepository.scala
index 1e0e07a44c..7a54cd474f 100644
--- a/webapp/sources/rudder/rudder-core/src/main/scala/com/normation/rudder/score/ScoreRepository.scala
+++ b/webapp/sources/rudder/rudder-core/src/main/scala/com/normation/rudder/score/ScoreRepository.scala
@@ -41,12 +41,13 @@ import com.normation.errors.IOResult
 import com.normation.inventory.domain.NodeId
 import com.normation.rudder.db.Doobie
 import doobie.Fragments
-import doobie.Get
-import doobie.Put
+import doobie.Meta
 import doobie.Read
 import doobie.Write
 import doobie.implicits._
 import doobie.implicits.toSqlInterpolator
+import doobie.postgres.implicits.pgEnumString
+import doobie.util.invariant.InvalidEnum
 import zio.interop.catz._
 import zio.json.ast.Json
 
@@ -63,8 +64,16 @@ trait ScoreRepository {
 class ScoreRepositoryImpl(doobie: Doobie) extends ScoreRepository {
 
   import com.normation.rudder.db.json.implicits._
-  implicit val getScoreValue: Get[ScoreValue] = Get[String].temap(ScoreValue.fromString)
-  implicit val putScoreValue: Put[ScoreValue] = Put[String].contramap(_.value)
+
+  implicit val scoreMeta: Meta[ScoreValue] = {
+    def getValue(value: String) = {
+      ScoreValue.fromString(value) match {
+        case Right(s)  => s
+        case Left(err) => throw InvalidEnum[ScoreValue](value)
+      }
+    }
+    pgEnumString("score", getValue, _.value)
+  }
 
   // implicit val stateWrite: Meta[Score] = new Meta(pgDecoderGet, pgEncoderPut)
 
diff --git a/webapp/sources/rudder/rudder-web/src/main/scala/bootstrap/liftweb/checks/migration/CheckTableScore.scala b/webapp/sources/rudder/rudder-web/src/main/scala/bootstrap/liftweb/checks/migration/CheckTableScore.scala
index 7ba86826e0..c2b77b999d 100644
--- a/webapp/sources/rudder/rudder-web/src/main/scala/bootstrap/liftweb/checks/migration/CheckTableScore.scala
+++ b/webapp/sources/rudder/rudder-web/src/main/scala/bootstrap/liftweb/checks/migration/CheckTableScore.scala
@@ -43,6 +43,7 @@ import com.normation.rudder.db.Doobie
 import com.normation.zio._
 import doobie.implicits._
 import zio.interop.catz._
+import zio.syntax.ToZio
 
 /*
  * During 8.1 cycle, we added a score that is applied to every nodes to give a better understanding
@@ -53,12 +54,15 @@ class CheckTableScore(
 
   import doobie._
 
-  override def description: String = "Check if database tables Users and UserSessions exist"
+  override def description: String = "Check if score databases exist"
 
   def createScoreTables: IOResult[Unit] = {
-    val sql1 = sql"""CREATE TABLE IF NOT EXISTS GlobalScore (
+
+    val checkType = sql"SELECT 1 FROM pg_type WHERE typname = 'score'"
+    val sqlType   = sql"""CREATE TYPE score AS enum ('A', 'B', 'C', 'D', 'E')"""
+    val sql1      = sql"""CREATE TABLE IF NOT EXISTS GlobalScore (
       nodeId  text primary key
-    , score   text NOT NULL CHECK (score <> '')
+    , score   score NOT NULL CHECK (score <> '')
     , message text NOT NULL CHECK (message <> '')
     , details jsonb NOT NULL
     );"""
@@ -66,12 +70,15 @@ class CheckTableScore(
     val sql2 = sql"""CREATE TABLE IF NOT EXISTS ScoreDetails (
       nodeId  text
     , scoreId text
-    , score   text NOT NULL CHECK (score <> '')
-    , message text NOT NULL CHECK (score <> '')
+    , score   score NOT NULL CHECK (score <> '')
+    , message text NOT NULL CHECK (message <> '')
     , details jsonb NOT NULL
     , PRIMARY KEY (nodeId, scoreId)
     );"""
 
+    transactIOResult(s"Error with 'score' type creation")(xa =>
+      checkType.query[Int].option.transact(xa).flatMap(i => if (i.isDefined) ().succeed else sqlType.update.run.transact(xa))
+    ).unit *>
     transactIOResult(s"Error with 'GlobalScore' table creation")(xa => sql1.update.run.transact(xa)).unit *>
     transactIOResult(s"Error with 'ScoreDetails' table creation")(xa => sql2.update.run.transact(xa)).unit
   }