diff --git a/Data~/hybridclr_version.json b/Data~/hybridclr_version.json
index f72f07e..a214301 100644
--- a/Data~/hybridclr_version.json
+++ b/Data~/hybridclr_version.json
@@ -2,18 +2,18 @@
     "versions": [
     {
         "unity_version":"2019",
-        "hybridclr" : { "branch":"v2.3.0"},
+        "hybridclr" : { "branch":"v2.3.1"},
         "il2cpp_plus": { "branch":"v2019-2.2.0"}
     },
     {
         "unity_version":"2020",
-        "hybridclr" : { "branch":"v2.3.0"},
-        "il2cpp_plus": { "branch":"v2020-2.2.0"}
+        "hybridclr" : { "branch":"v2.3.1"},
+        "il2cpp_plus": { "branch":"v2020-2.2.1"}
     },
     {
         "unity_version":"2021",
-        "hybridclr" : { "branch":"v2.3.0"},
-        "il2cpp_plus": { "branch":"v2021-2.2.0"}
+        "hybridclr" : { "branch":"v2.3.1"},
+        "il2cpp_plus": { "branch":"v2021-2.2.1"}
     }
     ]
 }
\ No newline at end of file
diff --git a/RELEASELOG.md b/RELEASELOG.md
index 7122fbd..b72d242 100644
--- a/RELEASELOG.md
+++ b/RELEASELOG.md
@@ -1,5 +1,14 @@
 # 发布日志
 
+## 2.4.2
+
+### 改动
+
+- 支持 2020.3.48，最后一个2020LTS版本
+- 支持 2021.3.25
+- hybridclr 升级到 v2.3.1
+- il2cpp_plus 升级到 v2020-2.2.1 、v2021-2.2.1
+
 ## 2.4.1
 
 ### 修复
diff --git a/package.json b/package.json
index fd1aeba..45b75be 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "com.focus-creative-games.hybridclr_unity",
-  "version": "2.4.1",
+  "version": "2.4.2",
   "displayName": "HybridCLR",
   "description": "HybridCLR is a fully featured, zero-cost, high-performance, low-memory solution for Unity's all-platform native c# hotupdate.",
   "category": "Runtime",