diff --git a/horreum-backend/src/main/java/io/hyperfoil/tools/horreum/hibernate/IntArrayType.java b/horreum-backend/src/main/java/io/hyperfoil/tools/horreum/hibernate/IntArrayType.java
index 147ecd7a1..8addb55c7 100644
--- a/horreum-backend/src/main/java/io/hyperfoil/tools/horreum/hibernate/IntArrayType.java
+++ b/horreum-backend/src/main/java/io/hyperfoil/tools/horreum/hibernate/IntArrayType.java
@@ -1,10 +1,117 @@
 package io.hyperfoil.tools.horreum.hibernate;
 
 
-import org.hibernate.type.BasicTypeReference;
+import org.hibernate.HibernateException;
+import org.hibernate.engine.spi.SharedSessionContractImplementor;
+import org.hibernate.type.CustomType;
+import org.hibernate.type.SqlTypes;
+import org.hibernate.type.spi.TypeConfiguration;
+import org.hibernate.usertype.UserType;
 
-public class IntArrayType {
+import java.io.Serializable;
+import java.sql.Array;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Types;
+import java.util.Arrays;
+import java.util.Objects;
+import java.util.stream.IntStream;
 
-    public static final BasicTypeReference<int[]> INT_ARRAY = new BasicTypeReference("int-array", int[].class, 666);
+import static java.lang.String.format;
 
+public class IntArrayType implements UserType<int[]> {
+
+    public static final CustomType INSTANCE = new CustomType<>(new IntArrayType(), new TypeConfiguration());
+    @Override
+    public int getSqlType() {
+        return SqlTypes.ARRAY;
+    }
+
+    @Override
+    public Class<int[]> returnedClass() {
+        return int[].class;
+    }
+
+    @Override
+    public boolean equals(int[] x, int[] y) {
+        return Arrays.equals(x, y);
+    }
+
+    @Override
+    public int hashCode(int[] x) {
+        return Objects.hashCode(x);
+    }
+
+    @Override
+    public int[] nullSafeGet(ResultSet rs, int position, SharedSessionContractImplementor session, Object owner)
+            throws SQLException {
+        if(rs.wasNull())
+            return null;
+        Array array = rs.getArray(position);
+        if (array == null) {
+            return null;
+        }
+        try {
+            return  (int[]) array.getArray();
+        } catch (final Exception ex) {
+            throw new RuntimeException("Failed to convert ResultSet to int[]: " + ex.getMessage(), ex);
+        }
+    }
+
+    @Override
+    public void nullSafeSet(PreparedStatement ps, int[] value, int index, SharedSessionContractImplementor session)
+            throws SQLException {
+        if (value == null) {
+            ps.setNull(index, Types.ARRAY);
+            return;
+        }
+        try {
+            Integer[] castArray = IntStream.of(value).boxed().toArray( Integer[]::new );
+            Array array = ps.getConnection().createArrayOf("integer", castArray);
+            ps.setArray(index, array);
+        } catch (final Exception ex) {
+            throw new RuntimeException(format("Failed to convert JSON to String: %s", ex.getMessage()), ex);
+        }
+    }
+
+    @Override
+    public int[] deepCopy(int[] value) throws HibernateException {
+        if (value == null) {
+            return null;
+        }
+        return Arrays.copyOf(value, value.length);
+    }
+
+    @Override
+    public boolean isMutable() {
+        return true;
+    }
+
+    @Override
+    public Serializable disassemble(int[] value) throws HibernateException {
+        return (Serializable) this.deepCopy(value);
+    }
+
+    @Override
+    public int[] assemble(Serializable cached, Object owner) throws HibernateException {
+        String stringArray = cached.toString().replaceAll("[\\[\\]]", "");
+        String[] tokens = stringArray.split(",");
+
+        int length = tokens.length;
+        int[] array = new int[length];
+        for (int i = 0; i < tokens.length; i++) {
+            array[i] = Integer.valueOf(tokens[i]);
+        }
+        return array;
+    }
+
+    @Override
+    public int[] replace(int[] original, int[] target, Object owner) throws HibernateException {
+        return original;
+    }
+
+    public String getName() {
+        return "int-array";
+    }
 }
diff --git a/horreum-backend/src/main/java/io/hyperfoil/tools/horreum/svc/AlertingServiceImpl.java b/horreum-backend/src/main/java/io/hyperfoil/tools/horreum/svc/AlertingServiceImpl.java
index 5fd3bbc7e..b38fd44b2 100644
--- a/horreum-backend/src/main/java/io/hyperfoil/tools/horreum/svc/AlertingServiceImpl.java
+++ b/horreum-backend/src/main/java/io/hyperfoil/tools/horreum/svc/AlertingServiceImpl.java
@@ -1032,7 +1032,7 @@ public List<DatapointLastTimestamp> findLastDatapoints(LastDatapointsParams para
       Query query = em.createNativeQuery(FIND_LAST_DATAPOINTS)
             .unwrap(NativeQuery.class)
             .setParameter(1, Util.parseFingerprint(params.fingerprint), JsonBinaryType.INSTANCE)
-            .setParameter(2, params.variables, IntArrayType.INT_ARRAY);
+            .setParameter(2, params.variables, IntArrayType.INSTANCE);
       SqlServiceImpl.setResultTransformer(query, Transformers.aliasToBean(DatapointLastTimestamp.class));
       //noinspection unchecked
       return query.getResultList();
diff --git a/horreum-backend/src/test/java/io/hyperfoil/tools/horreum/svc/AlertingServiceTest.java b/horreum-backend/src/test/java/io/hyperfoil/tools/horreum/svc/AlertingServiceTest.java
index b3faf0fe4..006448681 100644
--- a/horreum-backend/src/test/java/io/hyperfoil/tools/horreum/svc/AlertingServiceTest.java
+++ b/horreum-backend/src/test/java/io/hyperfoil/tools/horreum/svc/AlertingServiceTest.java
@@ -8,6 +8,7 @@
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.fail;
 
+import java.io.IOException;
 import java.time.Instant;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -23,6 +24,7 @@
 import io.hyperfoil.tools.horreum.api.alerting.DataPoint;
 import io.hyperfoil.tools.horreum.api.alerting.RunExpectation;
 import io.hyperfoil.tools.horreum.api.data.DataSet;
+import io.hyperfoil.tools.horreum.api.services.ExperimentService;
 import io.hyperfoil.tools.horreum.bus.MessageBusChannels;
 import jakarta.inject.Inject;
 
@@ -739,6 +741,18 @@ public void testRandomOrder(TestInfo info) throws InterruptedException {
       checkChanges(test);
    }
 
+   @org.junit.jupiter.api.Test
+   public void testFindLastDatapoints(TestInfo info) throws IOException {
+      populateDataFromFiles();
+      AlertingService.LastDatapointsParams params = new AlertingService.LastDatapointsParams();
+      params.fingerprint = mapper.valueToTree("{ \"fingerprint\":\"benchmark_test\"}").asText();
+      params.variables = new int[] {1,2,3};
+
+      List<AlertingService.DatapointLastTimestamp> timestamps =
+      jsonRequest().body(params).post("/api/alerting/datapoint/last")
+              .then().statusCode(200).extract().body().as(new ParameterizedTypeImpl(List.class, AlertingService.DatapointLastTimestamp.class));
+   }
+
    private void checkChanges(Test test) {
       List<ChangeDAO> list = ChangeDAO.list("variable.testId", test.id);
       assertEquals(Arrays.asList(1L, 4L, 6L, 7L, 9L),
@@ -761,4 +775,4 @@ private void drainQueue(BlockingQueue<Change.Event> changeQueue) throws Interrup
          }
       }
    }
-}
\ No newline at end of file
+}