diff --git a/indexer/src/main/java/au/org/aodn/esindexer/service/AodnDiscoveryParameterVocabService.java b/indexer/src/main/java/au/org/aodn/esindexer/service/AodnDiscoveryParameterVocabService.java
index 6e792572..4c525c05 100644
--- a/indexer/src/main/java/au/org/aodn/esindexer/service/AodnDiscoveryParameterVocabService.java
+++ b/indexer/src/main/java/au/org/aodn/esindexer/service/AodnDiscoveryParameterVocabService.java
@@ -19,9 +19,6 @@ public class AodnDiscoveryParameterVocabService {
     @Autowired
     VocabsUtils cacheArdcVocabsUtils;
 
-    @Value("${elasticsearch.index.categories.name}")
-    String categoriesIndexName;
-
     @Autowired
     ElasticsearchClient portalElasticsearchClient;
 
@@ -52,7 +49,7 @@ comparing by combined values (id and url) of the concept object
     public List<String> getAodnDiscoveryCategories(List<ThemesModel> themes) throws IOException {
         List<String> results = new ArrayList<>();
         // Iterate over the top-level vocabularies
-        for (JsonNode topLevelVocab : cacheArdcVocabsUtils.getDiscoveryCategories(categoriesIndexName)) {
+        for (JsonNode topLevelVocab : cacheArdcVocabsUtils.getDiscoveryCategories()) {
             if (topLevelVocab.has("narrower") && !topLevelVocab.get("narrower").isEmpty()) {
                 for (JsonNode secondLevelVocab : topLevelVocab.get("narrower")) {
                     String secondLevelVocabLabel = secondLevelVocab.get("label").asText();
diff --git a/indexer/src/main/java/au/org/aodn/esindexer/utils/VocabsUtils.java b/indexer/src/main/java/au/org/aodn/esindexer/utils/VocabsUtils.java
index f13357fa..4ae7da28 100644
--- a/indexer/src/main/java/au/org/aodn/esindexer/utils/VocabsUtils.java
+++ b/indexer/src/main/java/au/org/aodn/esindexer/utils/VocabsUtils.java
@@ -112,7 +112,7 @@ public void refreshDiscoveryCategoriesIndex() throws IOException {
     @Cacheable(AppConstants.AODN_DISCOVERY_CATEGORIES_CACHE)
     // TODO research strategy to avoid multiple refresh runs at the same schedule by multiple indexer instances
     // A way to do it is read the value from Elastic search, if it has updated within say 24 hrs then use it
-    public List<JsonNode> getDiscoveryCategories(String categoriesIndexName) throws IOException {
+    public List<JsonNode> getDiscoveryCategories() throws IOException {
         List<JsonNode> categories = new ArrayList<>();
         log.info("Fetching AODN Discovery Parameter Vocabularies from {}", categoriesIndexName);
         try {
@@ -140,7 +140,7 @@ public void refreshCache() throws IOException {
         log.info("Refreshing AODN Discovery Parameter Vocabularies cache");
         clearCache();
         this.refreshDiscoveryCategoriesIndex();
-        self.getDiscoveryCategories(categoriesIndexName);
+        self.getDiscoveryCategories();
     }
 
     @CacheEvict(value = AppConstants.AODN_DISCOVERY_CATEGORIES_CACHE, allEntries = true)