diff --git a/CHANGELOG.md b/CHANGELOG.md
index a0c8786..9a9638b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # 更新日志
 
+4.2.7 - 2025-08-04
+---
+- CHANGE: 在OCI镜像(docker)代理部分增加特殊处理, 保证可用性 参看[#159](https://github.com/WJQSERVER-STUDIO/ghproxy/issues/159)
+- CHANGE: 更新Touka框架, 同步解决部分日志过多问题
+
 4.2.6 - 2025-08-01
 ---
 - CHANGE: 修正匹配器
diff --git a/VERSION b/VERSION
index 0ce756d..c30a815 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.2.6
\ No newline at end of file
+4.2.7
\ No newline at end of file
diff --git a/go.mod b/go.mod
index 2635310..a267aaf 100644
--- a/go.mod
+++ b/go.mod
@@ -19,7 +19,7 @@ require (
 	github.com/fenthope/record v0.0.4
 	github.com/go-json-experiment/json v0.0.0-20250725192818-e39067aee2d2
 	github.com/hashicorp/golang-lru/v2 v2.0.7
-	github.com/infinite-iroha/touka v0.3.4
+	github.com/infinite-iroha/touka v0.3.6
 	github.com/wjqserver/modembed v0.0.1
 )
 
diff --git a/go.sum b/go.sum
index f6f4f93..d84ed19 100644
--- a/go.sum
+++ b/go.sum
@@ -20,8 +20,8 @@ github.com/go-json-experiment/json v0.0.0-20250725192818-e39067aee2d2 h1:iizUGZ9
 github.com/go-json-experiment/json v0.0.0-20250725192818-e39067aee2d2/go.mod h1:TiCD2a1pcmjd7YnhGH0f/zKNcCD06B029pHhzV23c2M=
 github.com/hashicorp/golang-lru/v2 v2.0.7 h1:a+bsQ5rvGLjzHuww6tVxozPZFVghXaHOwFs4luLUK2k=
 github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
-github.com/infinite-iroha/touka v0.3.4 h1:vYDjfXTkjpTe7tasSVbPeVAPSXzd/wS1T2tkiMx/Wwk=
-github.com/infinite-iroha/touka v0.3.4/go.mod h1:xOKkEKTWYLHIBW6qbL2O6nSAO0RyDLsVXPtJxFYg/YM=
+github.com/infinite-iroha/touka v0.3.6 h1:SkpM/VFGCWOFQP3RRuoWdX/Q4zafPngG1VMwkrLwtkw=
+github.com/infinite-iroha/touka v0.3.6/go.mod h1:XW7a3fpLAjJfylSmdNuDQ8wGKkKmLVi9V/89sT1d7uw=
 github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/wjqserver/modembed v0.0.1 h1:8ZDz7t9M5DLrUFlYgBUUmrMzxWsZPmHvOazkr/T2jEs=
diff --git a/proxy/docker.go b/proxy/docker.go
index 3287342..955f7e0 100644
--- a/proxy/docker.go
+++ b/proxy/docker.go
@@ -58,7 +58,13 @@ func GhcrWithImageRouting(cfg *config.Config) touka.HandlerFunc {
 		if strings.Contains(reqTarget, ".") || strings.Contains(reqTarget, ":") {
 			// 情况 A: reqTarget 是一个显式指定的主机名 (例如 "ghcr.io", "my-registry.com", "127.0.0.1:5000")
 			c.Debugf("Request target '%s' identified as an explicit hostname.", reqTarget)
-			upstreamTarget = reqTarget
+
+			// https://github.com/WJQSERVER-STUDIO/ghproxy/issues/159
+			if reqTarget == "docker.io" {
+				upstreamTarget = dockerhubTarget
+			} else {
+				upstreamTarget = reqTarget
+			}
 			// 上游请求的路径是主机名之后的部分
 			requestPath = fmt.Sprintf("%s/%s%s", reqImageUser, reqImageName, reqFilePath)
 			// 用于认证的镜像名是 user/repo