diff --git a/AlgebraicDataflowArchitectureModel/models/Accounts.model b/AlgebraicDataflowArchitectureModel/models/Accounts.model
index dba68ba..24710ee 100644
--- a/AlgebraicDataflowArchitectureModel/models/Accounts.model
+++ b/AlgebraicDataflowArchitectureModel/models/Accounts.model
@@ -1,5 +1,5 @@
 channel CIO1 {
-	out accounts(l:Map, signup(id:Int, name:Str)) = append(l, {"name": name})
+	out accounts(l:List, signup(name:Str)) = append(l, {"name": name})
 }
 
 channel CIO2(uid:Int) {