diff --git a/client.go b/client.go
index 28ac08c..91cdbe7 100644
--- a/client.go
+++ b/client.go
@@ -111,3 +111,25 @@ func (c APIClient) GetProgrammes(limit int) (programmes []Programme, err error)
 
 	return response.Data.Programmes, nil
 }
+
+func (c APIClient) UpdateMembrePreferedName(membreID string, name string) (err error) {
+	var request MembrePreferedNamePUTRequest
+
+	if !IsMembreID(membreID) {
+		return fmt.Errorf("Numéro étudiant '%s' invalide", membreID)
+	}
+	request.Param.MembreID = membreID
+	request.Data.PreferedName = name
+
+	response, err := request.Request(c.Voki)
+	if err != nil {
+		return
+	}
+
+	if code, message := response.StatusCode(), response.Message; code >= 400 {
+		err = fmt.Errorf("%d: %s", code, message)
+		return
+	}
+
+	return nil
+}
diff --git a/client_test.go b/client_test.go
index 7d3ad78..1a02a15 100644
--- a/client_test.go
+++ b/client_test.go
@@ -108,15 +108,12 @@ func TestAPI(t *testing.T) {
 			}
 		})
 
-	//TODO update membre prefered name
-	/*
-		t.Run("",
-			func(t *testing.T) {
-				if err := apiClient.UpdateMembrePreferedName(testMembres[0].ID, "User, Galaxy"); err != nil {
-					t.Error(err)
-				}
-			})
-	*/
+	t.Run("update membre prefered name",
+		func(t *testing.T) {
+			if err := apiClient.UpdateMembrePreferedName(testMembres[0].ID, "User, Galaxy"); err != nil {
+				t.Error(err)
+			}
+		})
 	t.Run("get membres, max 50",
 		func(t *testing.T) {
 			membres, err := apiClient.GetMembres(50)
diff --git a/db.go b/db.go
index 3ae7ee0..2608940 100644
--- a/db.go
+++ b/db.go
@@ -251,3 +251,24 @@ LIMIT
 		return programmes, nil
 	}
 }
+
+func (d *PostgresClient) UpdateMembrePreferedName(membreID string, name string) (err error) {
+	select {
+	case <-d.Ctx.Done():
+		return fmt.Errorf("PostgresClient.Ctx closed: %s", d.Ctx.Err())
+	default:
+		if !IsMembreID(membreID) {
+			return fmt.Errorf("Numéro étudiant '%s' invalide", membreID)
+		}
+
+		_, err = d.Pool.Exec(d.Ctx, `
+UPDATE
+  "membres"
+SET
+  prefered_name = $1
+WHERE
+  "membres".id = $2;
+`, name, membreID)
+	}
+	return
+}
diff --git a/request.go b/request.go
index ab4642d..97f51de 100644
--- a/request.go
+++ b/request.go
@@ -224,7 +224,7 @@ func (request MembrePreferedNamePUTRequest) Request(v *voki.Voki) (response Memb
 
 	statusCode, body, err := v.CallAndParse(
 		http.MethodPut,
-		"/api/v7/membre/%s/",
+		fmt.Sprintf("/api/v7/membre/%s/prefered_name/", request.Param.MembreID),
 		&buf,
 		true,
 	)
diff --git a/routes.go b/routes.go
index 1ec580e..355dd8f 100644
--- a/routes.go
+++ b/routes.go
@@ -253,5 +253,49 @@ func addRoutes(e *echo.Echo, db *PostgresClient) error {
 		}); err != nil {
 		return err
 	}
+
+	if err := pave.EchoRegister[MembrePreferedNamePUTRequest](
+		apiGroup,
+		&p,
+		apiPath,
+		http.MethodPut,
+		"/membre/:membre_id/prefered_name/",
+		"Update membre prefered name, which is prioritized in the membres_for_display view",
+		"MembrePreferedNamePUT", func(c echo.Context) error {
+			var request, response = MembrePreferedNamePUTRequest{}, MembrePreferedNamePUTResponse{}
+
+			request.Param.MembreID = c.Param("membre_id")
+
+			if err := c.Bind(&request.Data); err != nil {
+				var response voki.ResponseBadRequest
+				response.Message = fmt.Sprintf("parse request body: %s", err)
+				return c.JSON(response.StatusCode(), response)
+			}
+
+			if !request.Complete() {
+				var response voki.ResponseBadRequest
+				response.Message = "Incomplete MembrePreferedNamePUT request received"
+				return c.JSON(response.StatusCode(), response)
+			}
+
+			if err := db.UpdateMembrePreferedName(request.Param.MembreID, request.Data.PreferedName); err != nil {
+				var response voki.ResponseBadRequest
+				response.Message = fmt.Sprintf("db: %s", err)
+				return c.JSON(response.StatusCode(), response)
+			}
+
+			if err := response.SetStatusCode(http.StatusOK); err != nil {
+				var response voki.ResponseInternalServerError
+				response.Message = fmt.Sprintf("handler: %s", err)
+				return c.JSON(response.StatusCode(), response)
+			}
+
+			response.Message = fmt.Sprintf("Updated membre %s name to %s", request.Param.MembreID, request.Data.PreferedName)
+			return c.JSON(response.StatusCode(), response)
+
+		}); err != nil {
+		return err
+	}
+
 	return nil
 }