diff --git a/DOCKER_API_VERSION_MATRIX.md b/DOCKER_API_VERSION_MATRIX.md
index 3612fd97..db6d6eea 100644
--- a/DOCKER_API_VERSION_MATRIX.md
+++ b/DOCKER_API_VERSION_MATRIX.md
@@ -2,13 +2,13 @@
 
 This project is currently generated against:
 
-- Docker release tag: `docker-v29.4.1`
+- Docker release tag: `docker-v29.8.0`
 
 ## API version matrix
 
 | Docker version | Maximum API version |
 | --- | --- |
-| 29.4 | 1.54 |
+| 29.8 | 1.56 |
 
 ## References
 
diff --git a/Directory.Build.props b/Directory.Build.props
index dfa08155..bdb157e8 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,7 +1,7 @@
 <Project>
   <PropertyGroup>
     <LangVersion>latest</LangVersion>
-    <DockerVersion>v29.4.1</DockerVersion>
+    <DockerVersion>v29.8.0</DockerVersion>
   </PropertyGroup>
   <!-- Strong-naming -->
   <PropertyGroup Label="Signing">
diff --git a/src/Docker.DotNet/Models/HostConfig.Generated.cs b/src/Docker.DotNet/Models/HostConfig.Generated.cs
index 85d3329a..1e28345c 100644
--- a/src/Docker.DotNet/Models/HostConfig.Generated.cs
+++ b/src/Docker.DotNet/Models/HostConfig.Generated.cs
@@ -259,6 +259,12 @@ public HostConfig(Resources Resources)
         [JsonPropertyName("Runtime")]
         public string? Runtime { get; set; }
 
+        /// <summary>
+        /// Initial process umask
+        /// </summary>
+        [JsonPropertyName("Umask")]
+        public uint? Umask { get; set; }
+
         /// <summary>
         /// Applicable to Windows
         /// </summary>
diff --git a/src/Docker.DotNet/Models/ImageInspectResponse.Generated.cs b/src/Docker.DotNet/Models/ImageInspectResponse.Generated.cs
index 48a62f17..5d022f3f 100644
--- a/src/Docker.DotNet/Models/ImageInspectResponse.Generated.cs
+++ b/src/Docker.DotNet/Models/ImageInspectResponse.Generated.cs
@@ -97,7 +97,11 @@ public class ImageInspectResponse // (image.InspectResponse)
         public string? OsVersion { get; set; }
 
         /// <summary>
-        /// Size is the total size of the image including all layers it is composed of.
+        /// Size is the total size of the selected image variant, including all layers
+        /// it is composed of.
+        /// 
+        /// When using the containerd image store, this includes both the image content
+        /// that&apos;s present locally and the unpacked snapshot data.
         /// </summary>
         [JsonPropertyName("Size")]
         public long Size { get; set; } = default!;
diff --git a/tools/specgen/go.mod b/tools/specgen/go.mod
index 4496b1c7..b615a73b 100644
--- a/tools/specgen/go.mod
+++ b/tools/specgen/go.mod
@@ -3,8 +3,8 @@ module github.com/dotnet/Docker.DotNet/tools/specgen
 go 1.24.0
 
 require (
-	github.com/moby/moby/api v1.54.3-0.20260420162417-6c91b92cc710
-	github.com/moby/moby/client v0.4.2-0.20260420162417-6c91b92cc710
+	github.com/moby/moby/api v1.56.1-0.20260903211009-3ce5872b7950
+	github.com/moby/moby/client v0.6.1-0.20260903211009-3ce5872b7950
 )
 
 require (
diff --git a/tools/specgen/go.sum b/tools/specgen/go.sum
index 749f128e..78a4e9e1 100644
--- a/tools/specgen/go.sum
+++ b/tools/specgen/go.sum
@@ -27,10 +27,10 @@ github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/moby/docker-image-spec v1.3.1 h1:jMKff3w6PgbfSa69GfNg+zN/XLhfXJGnEx3Nl2EsFP0=
 github.com/moby/docker-image-spec v1.3.1/go.mod h1:eKmb5VW8vQEh/BAr2yvVNvuiJuY6UIocYsFu/DxxRpo=
-github.com/moby/moby/api v1.54.3-0.20260420162417-6c91b92cc710 h1:rfx6r+9HRR08bmnrWsNKPvmuBMhLh8FwSGFaeBrZhyo=
-github.com/moby/moby/api v1.54.3-0.20260420162417-6c91b92cc710/go.mod h1:+RQ6wluLwtYaTd1WnPLykIDPekkuyD/ROWQClE83pzs=
-github.com/moby/moby/client v0.4.2-0.20260420162417-6c91b92cc710 h1:vM435T9iE5OkpydLVtIIcLBqsBV4jWqSBFa5e5Uilkk=
-github.com/moby/moby/client v0.4.2-0.20260420162417-6c91b92cc710/go.mod h1:z52C9O2POPOsnxZAy//WtKcQ32P+jT/NGeXu/7nfjGQ=
+github.com/moby/moby/api v1.56.1-0.20260903211009-3ce5872b7950 h1:olZA+i1xKwKtDb7sJ0IBamfqcJs3Z3KdcA6riKmA7FQ=
+github.com/moby/moby/api v1.56.1-0.20260903211009-3ce5872b7950/go.mod h1:sZ+THbVWkjOmBPPfbnzdD/G1LuIexWhqlSHHPTDQ1Uk=
+github.com/moby/moby/client v0.6.1-0.20260903211009-3ce5872b7950 h1:v8ofTH8x2e8Fk5GCy0MKCawjwaRO8ucgKQjFFG7aTvI=
+github.com/moby/moby/client v0.6.1-0.20260903211009-3ce5872b7950/go.mod h1:OCo00wNRyA3m4lmJ228W3JbyCN4ZNNYjpOXiJydBdcQ=
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
 github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
 github.com/opencontainers/image-spec v1.1.1 h1:y0fUlFfIZhPF1W537XOLg0/fcx6zcHCJwooC2xJA040=