diff --git a/frontend/src/Settings/Profiles/Release/EditReleaseProfileModalContentConnector.js b/frontend/src/Settings/Profiles/Release/EditReleaseProfileModalContentConnector.js
index c9de8f735..58981939d 100644
--- a/frontend/src/Settings/Profiles/Release/EditReleaseProfileModalContentConnector.js
+++ b/frontend/src/Settings/Profiles/Release/EditReleaseProfileModalContentConnector.js
@@ -9,8 +9,8 @@ import EditReleaseProfileModalContent from './EditReleaseProfileModalContent';
 
 const newReleaseProfile = {
   enabled: true,
-  required: '',
-  ignored: '',
+  required: [],
+  ignored: [],
   preferred: [],
   includePreferredWhenRenaming: false,
   tags: [],
diff --git a/frontend/src/Settings/Profiles/Release/ReleaseProfile.js b/frontend/src/Settings/Profiles/Release/ReleaseProfile.js
index 400cbd137..9303db669 100644
--- a/frontend/src/Settings/Profiles/Release/ReleaseProfile.js
+++ b/frontend/src/Settings/Profiles/Release/ReleaseProfile.js
@@ -206,8 +206,8 @@ ReleaseProfile.propTypes = {
 
 ReleaseProfile.defaultProps = {
   enabled: true,
-  required: '',
-  ignored: '',
+  required: [],
+  ignored: [],
   preferred: [],
   indexerId: 0
 };
diff --git a/src/Sonarr.Api.V3/Profiles/Release/ReleaseProfileResource.cs b/src/Sonarr.Api.V3/Profiles/Release/ReleaseProfileResource.cs
index 9a5f5187c..7ac876a53 100644
--- a/src/Sonarr.Api.V3/Profiles/Release/ReleaseProfileResource.cs
+++ b/src/Sonarr.Api.V3/Profiles/Release/ReleaseProfileResource.cs
@@ -18,6 +18,9 @@ namespace Sonarr.Api.V3.Profiles.Release
 
         public ReleaseProfileResource()
         {
+            Required = new List<string>();
+            Ignored = new List<string>();
+            Preferred = new List<KeyValuePair<string, int>>();
             Tags = new HashSet<int>();
         }
     }