diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index f1c1e58..210d290 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.5.0"
+  ".": "0.5.1"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e1d9dd4..f17ea52 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.5.1](https://github.com/encryption4all/postguard-dotnet/compare/E4A.PostGuard-v0.5.0...E4A.PostGuard-v0.5.1) (2026-06-23)
+
+
+### Bug Fixes
+
+* emit inclusive range-end in Cryptify Content-Range header ([#34](https://github.com/encryption4all/postguard-dotnet/issues/34)) ([73c2e43](https://github.com/encryption4all/postguard-dotnet/commit/73c2e43993b805b188e07fe0d2073e36e335098b)), closes [#28](https://github.com/encryption4all/postguard-dotnet/issues/28)
+
 ## [0.5.0](https://github.com/encryption4all/postguard-dotnet/compare/E4A.PostGuard-v0.4.1...E4A.PostGuard-v0.5.0) (2026-06-19)
 
 
diff --git a/src/E4A.PostGuard.csproj b/src/E4A.PostGuard.csproj
index 5eedadf..7219715 100644
--- a/src/E4A.PostGuard.csproj
+++ b/src/E4A.PostGuard.csproj
@@ -9,7 +9,7 @@
 
     <!-- NuGet package metadata -->
     <PackageId>E4A.PostGuard</PackageId>
-    <Version>0.5.0</Version>
+    <Version>0.5.1</Version>
     <Authors>Encryption 4 All</Authors>
     <Description>PostGuard .NET SDK — identity-based encryption for secure file sharing</Description>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>