diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6e2bf81..c0d6bba 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@ A version's section is the GitHub release's notes. Each line is one change: what
 to do about it, and a link to the guide with the detail. [CONTRIBUTING.md](CONTRIBUTING.md#changelog)
 has the rules.
 
+## [10.5.0]
+
 ## [10.4.0] — 2026-10-26
 
 Some calls answer differently: [Changed answers in 10.4.0](https://github.com/CaffeinatedCoder/CodoMetis.ValueRanges/blob/main/docs/migration.md#changed-answers-in-1040).
diff --git a/Directory.Build.props b/Directory.Build.props
index 5d8c8a6..27fd56e 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,6 +1,6 @@
 <Project>
     <PropertyGroup>
-        <Version>10.4.0</Version>
+        <Version>10.5.0</Version>
         <Authors>CaffeinatedCoder</Authors>
         <PackageLicenseExpression>MIT</PackageLicenseExpression>
         <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -62,7 +62,7 @@
     -->
     <PropertyGroup>
         <EnablePackageValidation>true</EnablePackageValidation>
-        <PackageValidationBaselineVersion>10.3.0</PackageValidationBaselineVersion>
+        <PackageValidationBaselineVersion>10.4.0</PackageValidationBaselineVersion>
     </PropertyGroup>
 
     <!--
diff --git a/SECURITY.md b/SECURITY.md
index dc288b8..92925e3 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -53,8 +53,8 @@ maintained.
 
 | Version | Supported |
 |---|---|
-| 10.3.x | ✅ |
-| < 10.3 | ❌ |
+| 10.4.x | ✅ |
+| < 10.4 | ❌ |
 
 Previews (`11.0.0-preview.N`) are not supported versions and have no row: a fix reaches a preview
 in the next preview.
diff --git a/samples/Bookings/Bookings.csproj b/samples/Bookings/Bookings.csproj
index b95948e..4bf225e 100644
--- a/samples/Bookings/Bookings.csproj
+++ b/samples/Bookings/Bookings.csproj
@@ -12,7 +12,7 @@
         ships before it builds the sample, so CI runs it against the packages from the working tree.
     -->
     <ItemGroup>
-        <PackageReference Include="CodoMetis.ValueRanges.EFCore.PostgreSQL" Version="10.3.0" />
+        <PackageReference Include="CodoMetis.ValueRanges.EFCore.PostgreSQL" Version="10.4.0" />
     </ItemGroup>
 
 </Project>
diff --git a/src/CodoMetis.ValueRanges.EFCore.PostgreSQL.NodaTime/CHANGELOG.md b/src/CodoMetis.ValueRanges.EFCore.PostgreSQL.NodaTime/CHANGELOG.md
index a2addf6..bd564bf 100644
--- a/src/CodoMetis.ValueRanges.EFCore.PostgreSQL.NodaTime/CHANGELOG.md
+++ b/src/CodoMetis.ValueRanges.EFCore.PostgreSQL.NodaTime/CHANGELOG.md
@@ -3,6 +3,10 @@
 The changes that affect the NodaTime EF Core package. The [root changelog](https://github.com/CaffeinatedCoder/CodoMetis.ValueRanges/blob/main/CHANGELOG.md)
 covers all four packages, which share one version number and release together.
 
+## [10.5.0]
+
+No change in this package.
+
 ## [10.4.0] — 2026-10-26
 
 Some calls answer differently: [Changed answers in 10.4.0](https://github.com/CaffeinatedCoder/CodoMetis.ValueRanges/blob/main/docs/migration.md#changed-answers-in-1040).
diff --git a/src/CodoMetis.ValueRanges.EFCore.PostgreSQL/CHANGELOG.md b/src/CodoMetis.ValueRanges.EFCore.PostgreSQL/CHANGELOG.md
index 1b8d0d8..593782f 100644
--- a/src/CodoMetis.ValueRanges.EFCore.PostgreSQL/CHANGELOG.md
+++ b/src/CodoMetis.ValueRanges.EFCore.PostgreSQL/CHANGELOG.md
@@ -3,6 +3,10 @@
 The changes that affect the EF Core (Npgsql) package. The [root changelog](https://github.com/CaffeinatedCoder/CodoMetis.ValueRanges/blob/main/CHANGELOG.md)
 covers all four packages, which share one version number and release together.
 
+## [10.5.0]
+
+No change in this package.
+
 ## [10.4.0] — 2026-10-26
 
 Some calls answer differently: [Changed answers in 10.4.0](https://github.com/CaffeinatedCoder/CodoMetis.ValueRanges/blob/main/docs/migration.md#changed-answers-in-1040).
diff --git a/src/CodoMetis.ValueRanges.NodaTime/CHANGELOG.md b/src/CodoMetis.ValueRanges.NodaTime/CHANGELOG.md
index f5f919b..e619260 100644
--- a/src/CodoMetis.ValueRanges.NodaTime/CHANGELOG.md
+++ b/src/CodoMetis.ValueRanges.NodaTime/CHANGELOG.md
@@ -3,6 +3,10 @@
 The changes that affect the NodaTime package. The [root changelog](https://github.com/CaffeinatedCoder/CodoMetis.ValueRanges/blob/main/CHANGELOG.md)
 covers all four packages, which share one version number and release together.
 
+## [10.5.0]
+
+No change in this package.
+
 ## [10.4.0] — 2026-10-26
 
 No change in this package.
diff --git a/src/CodoMetis.ValueRanges/CHANGELOG.md b/src/CodoMetis.ValueRanges/CHANGELOG.md
index 40d57d3..5f95452 100644
--- a/src/CodoMetis.ValueRanges/CHANGELOG.md
+++ b/src/CodoMetis.ValueRanges/CHANGELOG.md
@@ -3,6 +3,10 @@
 The changes that affect the core package. The [root changelog](https://github.com/CaffeinatedCoder/CodoMetis.ValueRanges/blob/main/CHANGELOG.md)
 covers all four packages, which share one version number and release together.
 
+## [10.5.0]
+
+No change in this package.
+
 ## [10.4.0] — 2026-10-26
 
 No change in this package.