diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 88b715b0..ddab2acb 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        mongodb-version: [4.0.18]
+        mongodb-version: [6.0.24]
         java-version: [1.8]
 
     steps:
@@ -23,9 +23,9 @@ jobs:
           java-version: ${{ matrix.java-version }}
       - name: Install and Start MongoDB
         run: |
-          wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-${{ matrix.mongodb-version }}.tgz
-          tar xfz mongodb-linux-x86_64-${{ matrix.mongodb-version }}.tgz
-          export PATH=`pwd`/mongodb-linux-x86_64-${{ matrix.mongodb-version }}/bin:$PATH
+          wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-ubuntu2204-${{ matrix.mongodb-version }}.tgz
+          tar xfz mongodb-linux-x86_64-ubuntu2204-${{ matrix.mongodb-version }}.tgz
+          export PATH=`pwd`/mongodb-linux-x86_64-ubuntu2204-${{ matrix.mongodb-version }}/bin:$PATH
           mkdir -p data/db
           mongod --dbpath=data/db &
           mongod --version
diff --git a/variation-commons-mongodb/src/main/java/uk/ac/ebi/eva/commons/mongodb/writers/VariantSourceMongoWriter.java b/variation-commons-mongodb/src/main/java/uk/ac/ebi/eva/commons/mongodb/writers/VariantSourceMongoWriter.java
index bb7db4cc..6b602128 100644
--- a/variation-commons-mongodb/src/main/java/uk/ac/ebi/eva/commons/mongodb/writers/VariantSourceMongoWriter.java
+++ b/variation-commons-mongodb/src/main/java/uk/ac/ebi/eva/commons/mongodb/writers/VariantSourceMongoWriter.java
@@ -33,8 +33,6 @@
  */
 public class VariantSourceMongoWriter extends MongoItemWriter<IVariantSource> {
 
-    public static final String UNIQUE_FILE_INDEX_NAME = "unique_file";
-
     private MongoOperations mongoOperations;
 
     private String collection;
@@ -53,7 +51,7 @@ public VariantSourceMongoWriter(MongoOperations mongoOperations, String collecti
     }
 
     private void createIndexes() {
-        IndexOptions indexOptions = new IndexOptions().background(true).unique(true).name(UNIQUE_FILE_INDEX_NAME);
+        IndexOptions indexOptions = new IndexOptions().background(true).unique(true);
         mongoOperations.getCollection(collection).createIndex(
                 new Document(VariantSourceMongo.STUDYID_FIELD, 1).append(VariantSourceMongo.FILEID_FIELD, 1)
                                                                  .append(VariantSourceMongo.FILENAME_FIELD, 1),
diff --git a/variation-commons-mongodb/src/test/java/uk/ac/ebi/eva/commons/mongodb/writers/VariantSourceMongoWriterTest.java b/variation-commons-mongodb/src/test/java/uk/ac/ebi/eva/commons/mongodb/writers/VariantSourceMongoWriterTest.java
index cd55bdde..228fe896 100644
--- a/variation-commons-mongodb/src/test/java/uk/ac/ebi/eva/commons/mongodb/writers/VariantSourceMongoWriterTest.java
+++ b/variation-commons-mongodb/src/test/java/uk/ac/ebi/eva/commons/mongodb/writers/VariantSourceMongoWriterTest.java
@@ -170,11 +170,11 @@ public void shouldCreateUniqueFileIndex() throws Exception {
                 indexesInfo.map(index -> index.get("name").toString()).spliterator(), false)
                                                   .collect(Collectors.toSet());
         Set<String> expectedIndexes = new HashSet<>();
-        expectedIndexes.addAll(Arrays.asList(VariantSourceMongoWriter.UNIQUE_FILE_INDEX_NAME, "_id_"));
+        expectedIndexes.addAll(Arrays.asList("sid_1_fid_1_fname_1", "_id_"));
         assertEquals(expectedIndexes, createdIndexes);
 
         for(Document indexInfo: indexesInfo) {
-            if (VariantSourceMongoWriter.UNIQUE_FILE_INDEX_NAME.equals(indexInfo.get("name").toString())) {
+            if ("sid_1_fid_1_fname_1".equals(indexInfo.get("name").toString())) {
                 assertNotNull(indexInfo);
                 assertEquals("true", indexInfo.get(UNIQUE_INDEX).toString());
                 assertEquals("true", indexInfo.get(BACKGROUND_INDEX).toString());