diff --git a/java/pom.xml b/java/pom.xml
index b576af8c7f..09c4d9fdb7 100644
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -69,7 +69,7 @@
     <properties>
         <java.version>17</java.version>
         <powsybl-dependencies.version>2024.4.0</powsybl-dependencies.version>
-        <powsybl-open-rao.version>6.0.1</powsybl-open-rao.version>
+        <powsybl-open-rao.version>6.2.1</powsybl-open-rao.version>
         <powsybl-open-reac.version>0.10.0</powsybl-open-reac.version>
     </properties>
 
diff --git a/java/pypowsybl/src/main/java/com/powsybl/python/rao/RaoCFunctions.java b/java/pypowsybl/src/main/java/com/powsybl/python/rao/RaoCFunctions.java
index 857f5a5714..74eb6f1f86 100644
--- a/java/pypowsybl/src/main/java/com/powsybl/python/rao/RaoCFunctions.java
+++ b/java/pypowsybl/src/main/java/com/powsybl/python/rao/RaoCFunctions.java
@@ -11,10 +11,8 @@
 import com.powsybl.glsk.api.io.GlskDocumentImporters;
 import com.powsybl.glsk.commons.ZonalData;
 import com.powsybl.iidm.network.Network;
-import com.powsybl.openrao.commons.Unit;
-import com.powsybl.openrao.data.cracapi.Crac;
-import com.powsybl.openrao.data.raoresultapi.RaoResult;
-import com.powsybl.openrao.data.raoresultjson.RaoResultJsonExporter;
+import com.powsybl.openrao.data.crac.api.Crac;
+import com.powsybl.openrao.data.raoresult.api.RaoResult;
 import com.powsybl.openrao.raoapi.json.JsonRaoParameters;
 import com.powsybl.openrao.raoapi.parameters.RaoParameters;
 import com.powsybl.python.commons.Directives;
@@ -31,7 +29,7 @@
 
 import java.io.*;
 import java.nio.ByteBuffer;
-import java.util.Set;
+import java.util.Properties;
 
 import static com.powsybl.python.commons.Util.binaryBufferToBytes;
 import static com.powsybl.python.commons.Util.doCatch;
@@ -127,8 +125,10 @@ public static PyPowsyblApiHeader.ArrayPointer<CCharPointer> serializeRaoResultsT
             RaoResult raoResult = ObjectHandles.getGlobal().get(raoResultHandle);
             Crac crac = ObjectHandles.getGlobal().get(cracHandle);
             try (ByteArrayOutputStream output = new ByteArrayOutputStream()) {
-                new RaoResultJsonExporter().exportData(
-                    raoResult, crac, Set.of(Unit.MEGAWATT), output);
+                Properties properties = new Properties();
+                properties.setProperty("rao-result.export.json.flows-in-amperes", "true");
+                properties.setProperty("rao-result.export.json.flows-in-megawatts", "true");
+                raoResult.write("JSON", crac, properties, output);
                 return Util.createByteArray(output.toByteArray());
             } catch (IOException e) {
                 throw new PowsyblException("Could not serialize rao results : " + e.getMessage());
diff --git a/java/pypowsybl/src/main/java/com/powsybl/python/rao/RaoContext.java b/java/pypowsybl/src/main/java/com/powsybl/python/rao/RaoContext.java
index 8603110fc4..0ea1092aeb 100644
--- a/java/pypowsybl/src/main/java/com/powsybl/python/rao/RaoContext.java
+++ b/java/pypowsybl/src/main/java/com/powsybl/python/rao/RaoContext.java
@@ -10,8 +10,8 @@
 import com.powsybl.commons.PowsyblException;
 import com.powsybl.glsk.commons.ZonalData;
 import com.powsybl.iidm.network.Network;
-import com.powsybl.openrao.data.cracapi.Crac;
-import com.powsybl.openrao.data.raoresultapi.RaoResult;
+import com.powsybl.openrao.data.crac.api.Crac;
+import com.powsybl.openrao.data.raoresult.api.RaoResult;
 import com.powsybl.openrao.raoapi.Rao;
 import com.powsybl.openrao.raoapi.RaoInput;
 import com.powsybl.openrao.raoapi.parameters.RaoParameters;
diff --git a/java/pypowsybl/src/main/resources/META-INF/native-image/com.powsybl/open-rao-crac-io-json/resource-config.json b/java/pypowsybl/src/main/resources/META-INF/native-image/com.powsybl/open-rao-crac-io-json/resource-config.json
new file mode 100644
index 0000000000..23a25d8fe8
--- /dev/null
+++ b/java/pypowsybl/src/main/resources/META-INF/native-image/com.powsybl/open-rao-crac-io-json/resource-config.json
@@ -0,0 +1,6 @@
+{
+  "resources":{
+  "includes":[
+    {"pattern":".*\\.json"}
+  ]}
+}
diff --git a/tests/test_rao.py b/tests/test_rao.py
index 040c557be1..238418fd57 100644
--- a/tests/test_rao.py
+++ b/tests/test_rao.py
@@ -56,7 +56,7 @@ def test_rao_from_buffers():
     json_result = result.to_json()
 
     assert json_result["computationStatus"] == "default"
-    assert list(json_result.keys()) == ['type', 'version', 'info', 'computationStatus', 'optimizationStepsExecuted', 'costResults',
+    assert list(json_result.keys()) == ['type', 'version', 'info', 'computationStatus', 'executionDetails', 'costResults',
                                     'computationStatusMap', 'flowCnecResults', 'angleCnecResults', 'voltageCnecResults',
                                     'networkActionResults', 'rangeActionResults']