diff --git a/package.json b/package.json
index 0bcd93d..7dac7e3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@hibas123/jrpcgen",
-   "version": "1.0.26",
+   "version": "1.0.27",
    "main": "lib/index.js",
    "license": "MIT",
    "packageManager": "yarn@3.1.1",
diff --git a/src/targets/csharp.ts b/src/targets/csharp.ts
index 2699120..ce8d099 100644
--- a/src/targets/csharp.ts
+++ b/src/targets/csharp.ts
@@ -129,6 +129,7 @@ export class CSharpTarget extends CompileTarget<{ csharp_namespace: string }> {
       a(0, `using System.Text.Json.Serialization;`);
       a(0, `using System.Text.Json.Nodes;`);
       a(0, `using System.Threading.Tasks;`);
+      a(0, `using System.Collections.Generic;`);
       a(0, ``);
       a(0, `namespace ${this.namespace};`);
       a(0, ``);
@@ -215,6 +216,7 @@ export class CSharpTarget extends CompileTarget<{ csharp_namespace: string }> {
       a(0, `using System.Text.Json.Serialization;`);
       a(0, `using System.Text.Json.Nodes;`);
       a(0, `using System.Threading.Tasks;`);
+      a(0, `using System.Collections.Generic;`);
       a(0, ``);
       a(0, `namespace ${this.namespace};`);
       a(0, ``);