diff --git a/CHANGELOG.md b/CHANGELOG.md
index d41611a..c13ef39 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog: @go/encoding
 
+## v1.5.6 (2026-07-18)
+- **依赖校验修复**: 更新 `go.sum` 为当前可验证的依赖 checksum。
+
 ## v1.5.5 (2026-06-22)
 - **安全与防碰撞重构 (In-place & Non-linear)**:
   - 修复 `ExchangeInt` 变成就地修改并写回，解决了 ordered 模式下混淆被完全丢弃的回归 Bug。使用栈分配优化了 `size <= 20` 时的无逃逸零拷贝性能。
diff --git a/TEST.md b/TEST.md
index 7ae6bad..f98b4dc 100644
--- a/TEST.md
+++ b/TEST.md
@@ -1,5 +1,8 @@
 # Test Report: @go/encoding
 
+## v1.5.6 验证
+- 独立模块解析、全量测试与基准测试均通过。
+
 ## 📋 测试概览
 - **测试时间**: 2026-06-22
 - **测试环境**: darwin/amd64
diff --git a/go.sum b/go.sum
index 32b1022..0087d91 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,6 @@
-apigo.cc/go/cast v1.5.0 h1:UBGJtFQ8eJPMQXs37cUgqd7YQo1zI9opuSDBDmn2/pE=
-apigo.cc/go/cast v1.5.0/go.mod h1:z2GW5p5WCZGEqVVIJUdhl232vRbLf2Qu4EDlEakX/D8=
-apigo.cc/go/jsmod v1.5.0 h1:JgQtJNiJWy1NOP9AzE8NX5VXJkpO/x3GqLsCCSny5Ec=
-apigo.cc/go/jsmod v1.5.0/go.mod h1:bmyeZtOAP/j5am+YRnaiM89smysK24K7ebk0koFtsSw=
+apigo.cc/go/cast v1.5.3 h1:jk6VX0rGFhjKtfPhsaV6IKYpiGmORRk9qPTtuNS53tw=
+apigo.cc/go/cast v1.5.3/go.mod h1:GMjjrYn93tWat1U409G7h1jR3ejfLLI7r0efBo9Sbd4=
+apigo.cc/go/jsmod v1.5.3 h1:S3W317bH0QV2NMeRO1E0v6ySIBOfMWYv/NuQJbvqKWU=
+apigo.cc/go/jsmod v1.5.3/go.mod h1:bmyeZtOAP/j5am+YRnaiM89smysK24K7ebk0koFtsSw=
+apigo.cc/go/rand v1.5.3 h1:O4bPIwyaOWEBCr0nL9A4G4qG48AqiGTCzfPeckm3Ius=
+apigo.cc/go/rand v1.5.3/go.mod h1:q1BTFkY/cXE229dDD5Q22lF7T0DoKPV6xAu+6bCrDH4=