diff --git a/src/main/java/com/uid2/core/vertx/CoreVerticle.java b/src/main/java/com/uid2/core/vertx/CoreVerticle.java
index 5048558..530e388 100644
--- a/src/main/java/com/uid2/core/vertx/CoreVerticle.java
+++ b/src/main/java/com/uid2/core/vertx/CoreVerticle.java
@@ -621,7 +621,7 @@ void handleCloudEncryptionKeysRetrieval(RoutingContext rc) {
             }
 
             JsonObject response = new JsonObject()
-                    .put("cloudEncryptionKeys", new JsonArray(cloudEncryptionKeys));
+                    .put("cloud_encryption_keys", new JsonArray(cloudEncryptionKeys));
 
             rc.response().putHeader(HttpHeaders.CONTENT_TYPE, "application/json")
                     .end(response.encode());
diff --git a/src/test/java/com/uid2/core/vertx/TestCoreVerticle.java b/src/test/java/com/uid2/core/vertx/TestCoreVerticle.java
index dc271e9..7821013 100644
--- a/src/test/java/com/uid2/core/vertx/TestCoreVerticle.java
+++ b/src/test/java/com/uid2/core/vertx/TestCoreVerticle.java
@@ -673,7 +673,7 @@ void cloudEncryptionKeyRetrieveSuccess(Vertx vertx, VertxTestContext testContext
                     assertEquals(200, response.statusCode());
 
                     JsonObject json = response.bodyAsJsonObject();
-                    JsonArray cloudEncryptionKeysArray = json.getJsonArray("cloudEncryptionKeys");
+                    JsonArray cloudEncryptionKeysArray = json.getJsonArray("cloud_encryption_keys");
 
                     assertNotNull(cloudEncryptionKeysArray);
                     assertEquals(1, cloudEncryptionKeysArray.size());
@@ -721,7 +721,7 @@ void cloudEncryptionKeyRetrieveSuccessWithThreeKeys(Vertx vertx, VertxTestContex
                     assertEquals(200, response.statusCode());
 
                     JsonObject json = response.bodyAsJsonObject();
-                    JsonArray cloudEncryptionKeysArray = json.getJsonArray("cloudEncryptionKeys");
+                    JsonArray cloudEncryptionKeysArray = json.getJsonArray("cloud_encryption_keys");
 
                     assertNotNull(cloudEncryptionKeysArray);
                     assertEquals(3, cloudEncryptionKeysArray.size());