diff --git a/graalvm-config-dir/reflect-config.json b/graalvm-config-dir/reflect-config.json
index 9bbc9a93..b1066a68 100644
--- a/graalvm-config-dir/reflect-config.json
+++ b/graalvm-config-dir/reflect-config.json
@@ -312,6 +312,12 @@
   "allDeclaredConstructors":true,
   "allPublicConstructors":true
 },
+{
+  "name":"org.asamk.signal.json.JsonAttachment",
+  "allDeclaredFields":true,
+  "allDeclaredMethods":true,
+  "allDeclaredConstructors":true
+},
 {
   "name":"org.asamk.signal.json.JsonDataMessage",
   "allDeclaredFields":true,