diff --git a/CHANGELOG.md b/CHANGELOG.md
index 805dcb0..72dbdf0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## v1.0.4 (2026-05-12)
+- **依赖同步**：同步更新 `go/cast` 和 `go/file` 至最新版本。
+- **文档优化**：完善 README 与测试用例。
+
 ## v1.0.3 (2026-05-12)
 
 - 重构并更名为 `document`，统一处理 Excel, Word, PPT, PDF。
diff --git a/go.mod b/go.mod
index 8983ab6..85bfd36 100644
--- a/go.mod
+++ b/go.mod
@@ -3,8 +3,8 @@ module apigo.cc/go/document
 go 1.25.0
 
 require (
-	apigo.cc/go/cast v1.3.0
-	apigo.cc/go/file v1.3.0
+	apigo.cc/go/cast v1.3.1
+	apigo.cc/go/file v1.3.1
 	github.com/dslipak/pdf v0.0.2
 	github.com/xuri/excelize/v2 v2.10.1
 	github.com/young2j/oxmltotext v1.0.3
diff --git a/go.sum b/go.sum
index ea37e74..2d2b641 100644
--- a/go.sum
+++ b/go.sum
@@ -1,9 +1,9 @@
-apigo.cc/go/cast v1.3.0 h1:ZTcLYijkqZjSWSCSpJUWMfzJYeJKbwKxquKkPrFsROQ=
-apigo.cc/go/cast v1.3.0/go.mod h1:lGlwImiOvHxG7buyMWhFzcdvQzmSaoKbmr7bcDfUpHk=
+apigo.cc/go/cast v1.3.1 h1:Y64mit3tCtA1gnSaeaPNf9QjvwX1RA+hFc80j/yUMnI=
+apigo.cc/go/cast v1.3.1/go.mod h1:lGlwImiOvHxG7buyMWhFzcdvQzmSaoKbmr7bcDfUpHk=
 apigo.cc/go/encoding v1.3.0 h1:8jqNHoZBR8vOU/BGsLFebfp1Txa1UxDRpd7YwzIFLJs=
 apigo.cc/go/encoding v1.3.0/go.mod h1:kT/uUJiuAOkZ4LzUWrUtk/I0iL1D8aatvD+59bDnHBo=
-apigo.cc/go/file v1.3.0 h1:xG9FcY3Rv6Br83r9pq9QsIXFrplx4g8ITOkHSzfzXRg=
-apigo.cc/go/file v1.3.0/go.mod h1:pYHBlB/XwsrnWpEh7GIFpbiqobrExfiB+rEN8V2d2kY=
+apigo.cc/go/file v1.3.1 h1:qHgiJsn1K9DazWRrPoHVnXtp6hDGGsUpAE/4G1bFXqY=
+apigo.cc/go/file v1.3.1/go.mod h1:pYHBlB/XwsrnWpEh7GIFpbiqobrExfiB+rEN8V2d2kY=
 apigo.cc/go/rand v1.3.0 h1:k+UFAhMySwXf+dq8Om9TniZV6fm6gAE0evbrqMEdwQU=
 apigo.cc/go/rand v1.3.0/go.mod h1:mZ/4Soa3bk+XvDaqPWJuUe1bfEi4eThBj1XmEAuYxsk=
 apigo.cc/go/safe v1.3.0 h1:uctdAUsphT9p60Tk4oS5xPCe0NoIdOHfsYv4PNS0Rok=
@@ -59,7 +59,9 @@ go.uber.org/zap v1.26.0/go.mod h1:dtElttAiwGvoJ/vj4IwHBS/gXsEu/pZ50mUIRWuG0so=
 golang.org/x/crypto v0.51.0 h1:IBPXwPfKxY7cWQZ38ZCIRPI50YLeevDLlLnyC5wRGTI=
 golang.org/x/crypto v0.51.0/go.mod h1:8AdwkbraGNABw2kOX6YFPs3WM22XqI4EXEd8g+x7Oc8=
 golang.org/x/image v0.40.0 h1:Tw4GyDXMo+daZN1znreBRC3VayR1aLFUyUEOLUdW1a8=
+golang.org/x/image v0.40.0/go.mod h1:uIc348UZMSvS5Z65CVZ7iDPaNobNFEPeJ4kbqTOszmA=
 golang.org/x/net v0.54.0 h1:2zJIZAxAHV/OHCDTCOHAYehQzLfSXuf/5SoL/Dv6w/w=
+golang.org/x/net v0.54.0/go.mod h1:Sj4oj8jK6XmHpBZU/zWHw3BV3abl4Kvi+Ut7cQcY+cQ=
 golang.org/x/sys v0.44.0 h1:ildZl3J4uzeKP07r2F++Op7E9B29JRUy+a27EibtBTQ=
 golang.org/x/sys v0.44.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
 golang.org/x/text v0.37.0 h1:Cqjiwd9eSg8e0QAkyCaQTNHFIIzWtidPahFWR83rTrc=