1 files changed, 1 insertions, 1 deletions

diff --git a/src/wixext/HttpWindowsInstallerBackendBinderExtension.cs b/src/wixext/HttpWindowsInstallerBackendBinderExtension.cs
index 7a94257b..8e4f1a96 100644
--- a/src/wixext/HttpWindowsInstallerBackendBinderExtension.cs
+++ b/src/wixext/HttpWindowsInstallerBackendBinderExtension.cs
@@ -8,6 +8,6 @@ namespace WixToolset.Http
 
     public class HttpWindowsInstallerBackendBinderExtension : BaseWindowsInstallerBackendBinderExtension
     {
-        public override IEnumerable<TableDefinition> TableDefinitions => HttpTableDefinitions.All;
+        public override IReadOnlyCollection<TableDefinition> TableDefinitions => HttpTableDefinitions.All;
     }
 }