diff --git a/backend/internal/pkg/claude/constants.go b/backend/internal/pkg/claude/constants.go
index fb95ffe2..8b3441dc 100644
--- a/backend/internal/pkg/claude/constants.go
+++ b/backend/internal/pkg/claude/constants.go
@@ -40,13 +40,15 @@ const APIKeyHaikuBetaHeader = BetaInterleavedThinking
 
 // DefaultHeaders 是 Claude Code 客户端默认请求头。
 var DefaultHeaders = map[string]string{
-	"User-Agent":                                "claude-cli/2.1.2 (external, cli)",
+	// Keep these in sync with recent Claude CLI traffic to reduce the chance
+	// that Claude Code-scoped OAuth credentials are rejected as "non-CLI" usage.
+	"User-Agent":                                "claude-cli/2.1.22 (external, cli)",
 	"X-Stainless-Lang":                          "js",
 	"X-Stainless-Package-Version":               "0.70.0",
 	"X-Stainless-OS":                            "Linux",
-	"X-Stainless-Arch":                          "x64",
+	"X-Stainless-Arch":                          "arm64",
 	"X-Stainless-Runtime":                       "node",
-	"X-Stainless-Runtime-Version":               "v24.3.0",
+	"X-Stainless-Runtime-Version":               "v24.13.0",
 	"X-Stainless-Retry-Count":                   "0",
 	"X-Stainless-Timeout":                       "600",
 	"X-App":                                     "cli",
diff --git a/backend/internal/service/identity_service.go b/backend/internal/service/identity_service.go
index 4e227fea..a620ac4d 100644
--- a/backend/internal/service/identity_service.go
+++ b/backend/internal/service/identity_service.go
@@ -26,13 +26,13 @@ var (
 
 // 默认指纹值（当客户端未提供时使用）
 var defaultFingerprint = Fingerprint{
-	UserAgent:               "claude-cli/2.1.2 (external, cli)",
+	UserAgent:               "claude-cli/2.1.22 (external, cli)",
 	StainlessLang:           "js",
 	StainlessPackageVersion: "0.70.0",
 	StainlessOS:             "Linux",
-	StainlessArch:           "x64",
+	StainlessArch:           "arm64",
 	StainlessRuntime:        "node",
-	StainlessRuntimeVersion: "v24.3.0",
+	StainlessRuntimeVersion: "v24.13.0",
 }
 
 // Fingerprint represents account fingerprint data