diff --git a/spec/openapi.yaml b/spec/openapi.yaml
index 501f95c3c75dc0a854bbedf92dc451eadf352af3..81fdb0cd9ac27a5d4b2571159fe268446ad1c401 100644
--- a/spec/openapi.yaml
+++ b/spec/openapi.yaml
@@ -73,7 +73,7 @@ paths:
                content:
                   application/json:
                      schema:
-                        $ref: "#/components/schemas/MailingList"
+                        $ref: "#/components/schemas/MailingLists"
             404:
                description: Not found
             500:
diff --git a/src/main/java/org/eclipsefoundation/mailing/resources/MailingListsResource.java b/src/main/java/org/eclipsefoundation/mailing/resources/MailingListsResource.java
index 3ebaf4635aa4718cd7ea771643ab36de4bd57f18..d76872607734f9e8dc4044c6b0ba1b35d75e86ca 100644
--- a/src/main/java/org/eclipsefoundation/mailing/resources/MailingListsResource.java
+++ b/src/main/java/org/eclipsefoundation/mailing/resources/MailingListsResource.java
@@ -11,6 +11,7 @@
 **********************************************************************/
 package org.eclipsefoundation.mailing.resources;
 
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.stream.Collectors;
@@ -89,7 +90,7 @@ public class MailingListsResource {
         // add count to singular mailing list retrieval
         MailingLists ml = mailingLists.get(0);
         ml.setCount(dao.count(new RDBMSQuery<>(wrap, filters.get(MailingListSubscriptions.class), params)));
-        return Response.ok(ml).build();
+        return Response.ok(Arrays.asList(ml)).build();
     }
 
     @GET
diff --git a/src/test/java/org/eclipsefoundation/mailing/resources/MailingListsResourceTests.java b/src/test/java/org/eclipsefoundation/mailing/resources/MailingListsResourceTests.java
index b9a4eb8f805886155cca0dd4f06bb7b29365d045..e18de428ea68152c88c966af6072fe5f56012ba9 100644
--- a/src/test/java/org/eclipsefoundation/mailing/resources/MailingListsResourceTests.java
+++ b/src/test/java/org/eclipsefoundation/mailing/resources/MailingListsResourceTests.java
@@ -58,7 +58,7 @@ class MailingListsResourceTests {
      */
     public static final EndpointTestCase GET_MAILING_LISTS_BY_NAME_SUCCESS = TestCaseHelper
             .buildSuccessCase(MAILING_LISTS_BY_NAME_URL, new String[] { "eclipse-dev" },
-                    SchemaNamespaceHelper.MAILING_LIST_SCHEMA_PATH);
+                    SchemaNamespaceHelper.MAILING_LISTS_SCHEMA_PATH);
 
     public static final EndpointTestCase GET_MAILING_LISTS_BY_NAME_INVALID_FORMAT = TestCaseHelper
             .buildInvalidFormatCase(MAILING_LISTS_BY_NAME_URL, new String[] { "eclipse-dev" }, ContentType.XML);