diff --git a/frontend/src/domain/use_cases/administrative/showAdministrativeLayer.ts b/frontend/src/domain/use_cases/administrative/showAdministrativeLayer.ts
index 86aa8b38d..fdc5e7361 100644
--- a/frontend/src/domain/use_cases/administrative/showAdministrativeLayer.ts
+++ b/frontend/src/domain/use_cases/administrative/showAdministrativeLayer.ts
@@ -1,5 +1,5 @@
 import { OPENLAYERS_PROJECTION, WSG84_PROJECTION } from '@mtes-mct/monitor-ui'
-import _ from 'lodash'
+import { find, flatten } from 'lodash'
 import GeoJSON from 'ol/format/GeoJSON'
 import VectorImageLayer from 'ol/layer/VectorImage'
 import { bbox as bboxStrategy } from 'ol/loadingstrategy'
@@ -10,6 +10,9 @@ import { getAdministrativeLayersStyle } from '../../../features/map/layers/style
 import { administrativeLayers } from '../../entities/administrativeLayers'
 import { LayerType } from '../../entities/layers/constants'
 
+import type { Feature } from 'ol'
+import type { Geometry } from 'ol/geom'
+
 const IRRETRIEVABLE_FEATURES_EVENT = 'IRRETRIEVABLE_FEATURES'
 
 const setIrretrievableFeaturesEvent = error => ({
@@ -19,7 +22,7 @@ const setIrretrievableFeaturesEvent = error => ({
 
 export const getAdministrativeVectorLayer = layerId => {
   // TODO Type these `any`.
-  const layerDefinition: any = _.find(_.flatten(administrativeLayers as any), (l: any) => l.code === layerId)
+  const layerDefinition: any = find(flatten(administrativeLayers as any), (l: any) => l.code === layerId)
   const code = layerDefinition?.groupCode || layerDefinition?.code
   const zone = layerDefinition?.groupCode ? layerDefinition?.code : undefined
   const layer = new VectorImageLayer({
@@ -30,13 +33,7 @@ export const getAdministrativeVectorLayer = layerId => {
       type: LayerType.ADMINISTRATIVE
     },
     source: getAdministrativeVectorSourceBBOXStrategy(code, zone),
-    style: getAdministrativeLayersStyle(code),
-    // TODO TS tells this prop doesn't exist, does it?
-    // `updateWhileAnimating` & `updateWhileInteracting` don't exist
-    // => https://github.com/openlayers/openlayers/issues/11250#issuecomment-654150900 (interesting thread by the way)
-    // @ts-ignore
-    updateWhileAnimating: true,
-    updateWhileInteracting: true
+    style: getAdministrativeLayersStyle(code)
   })
 
   return layer
@@ -58,8 +55,9 @@ function getAdministrativeVectorSourceBBOXStrategy(code, subZone) {
       getAdministrativeZoneFromAPI(code, extent, subZone)
         .then(administrativeZone => {
           vectorSource.clear(true)
-          // TODO Type this `any`.
-          vectorSource.addFeatures(vectorSource.getFormat()?.readFeatures(administrativeZone) as any)
+          const features: Feature<Geometry>[] = vectorSource.getFormat()?.readFeatures(administrativeZone) ?? []
+
+          vectorSource.addFeatures(features)
         })
         .catch(e => {
           // TODO Type this `any`.
diff --git a/frontend/src/features/map/layers/styles/administrativeAndRegulatoryLayers.style.ts b/frontend/src/features/map/layers/styles/administrativeAndRegulatoryLayers.style.ts
index 7e7fa1c8f..bd2c5c578 100644
--- a/frontend/src/features/map/layers/styles/administrativeAndRegulatoryLayers.style.ts
+++ b/frontend/src/features/map/layers/styles/administrativeAndRegulatoryLayers.style.ts
@@ -96,20 +96,32 @@ export const getAdministrativeLayersStyle = (code: String) => {
           })
         })
     case Layers.DEPARTMENTS.code:
-      return feature =>
-        new Style({
-          stroke: new Stroke({
-            color: darkPeriwinkle,
-            width: 2
+      return feature => {
+        const geometry = feature.getGeometry()
+        const center = geometry.getExtent()
+        const point = new Point(getCenter(center))
+
+        return [
+          new Style({
+            stroke: new Stroke({
+              color: darkPeriwinkle,
+              width: 2
+            })
           }),
-          text: new Text({
-            fill: new Fill({ color: THEME.color.gunMetal }),
-            font: '16px Marianne',
-            overflow: true,
-            stroke: new Stroke({ color: getColorWithAlpha(THEME.color.white, 0.9), width: 2 }),
-            text: `${feature.get(Layers.DEPARTMENTS.zoneFieldKey) ? feature.get(Layers.DEPARTMENTS.zoneFieldKey) : ''}`
+          new Style({
+            geometry: point,
+            text: new Text({
+              fill: new Fill({ color: THEME.color.gunMetal }),
+              font: '16px Marianne',
+              overflow: true,
+              repeat: 1,
+              stroke: new Stroke({ color: getColorWithAlpha(THEME.color.white, 0.9), width: 2 }),
+              text: `${feature.get(Layers.DEPARTMENTS.zoneFieldKey) ?? ''}`
+            })
           })
-        })
+        ]
+      }
+
     case Layers.SALTWATER_LIMIT_AREAS.code:
     case Layers.TRANSVERSAL_SEA_LIMIT_AREAS.code:
       return () =>