diff --git a/CHANGELOG.md b/CHANGELOG.md
index b7d3345..4769ba5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,9 +6,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.0.0] - 2026-04-30
+
 ### Added
 
 - Added feature by issue.([Issue #1](https://github.com/overdrive1708/PhotoFrameGenerator/issues/1))
 - Added feature by issue.([Issue #2](https://github.com/overdrive1708/PhotoFrameGenerator/issues/2))
 
 [Unreleased]: https://github.com/overdrive1708/PhotoFrameGenerator
+[1.0.0]: https://github.com/overdrive1708/PhotoFrameGenerator/tag/v1.0.0
diff --git a/src/PhotoFrameGenerator/PhotoFrameGenerator.csproj b/src/PhotoFrameGenerator/PhotoFrameGenerator.csproj
index cdaf99d..92b861d 100644
--- a/src/PhotoFrameGenerator/PhotoFrameGenerator.csproj
+++ b/src/PhotoFrameGenerator/PhotoFrameGenerator.csproj
@@ -7,7 +7,7 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <UseWPF>true</UseWPF>
 	<Product>PhotoFrameGenerator</Product>
-	<VersionPrefix>0.1.0</VersionPrefix>
+	<VersionPrefix>1.0.0</VersionPrefix>
 	<Authors>overdrive1708</Authors>
 	<Copyright>Copyright © 2026 overdrive1708</Copyright>
 	<PackageProjectUrl>https://github.com/overdrive1708/PhotoFrameGenerator</PackageProjectUrl>