diff --git a/Directory.Packages.props b/Directory.Packages.props
index e18994c25c..cae10b4aa5 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -7,9 +7,9 @@
     <PackageVersion Include="AvalonEdit" Version="6.3.0.90" />
     <PackageVersion Include="CliWrap" Version="3.7.0" />
     <PackageVersion Include="DataGridExtensions" Version="2.6.0" />
-    <PackageVersion Include="DiffLib" Version="2017.7.26.1241" />
+    <PackageVersion Include="DiffLib" Version="2025.0.0" />
     <PackageVersion Include="Dirkster.AvalonDock.Themes.VS2013" Version="4.72.1" />
-    <PackageVersion Include="FluentAssertions" Version="7.0.0" />
+    <PackageVersion Include="FluentAssertions" Version="8.0.0" />
     <PackageVersion Include="ILCompiler.Reflection.ReadyToRun.Experimental" Version="9.0.1-rtm.24557.9" />
     <PackageVersion Include="Iced" Version="1.21.0" />
     <PackageVersion Include="JunitXml.TestLogger" Version="5.0.0" />
@@ -39,11 +39,11 @@
     <PackageVersion Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageVersion Include="NuGet.Protocol" Version="6.12.1" />
     <PackageVersion Include="PowerShellStandard.Library" Version="5.1.1" />
-    <PackageVersion Include="System.Composition.AttributedModel" Version="9.0.0" />
-    <PackageVersion Include="System.Collections.Immutable" Version="9.0.0" />
+    <PackageVersion Include="System.Composition.AttributedModel" Version="9.0.1" />
+    <PackageVersion Include="System.Collections.Immutable" Version="9.0.1" />
     <PackageVersion Include="System.Memory" Version="4.6.0" />
-    <PackageVersion Include="System.Reflection.Metadata" Version="9.0.0" />
-    <PackageVersion Include="System.Resources.Extensions" Version="9.0.0" />
+    <PackageVersion Include="System.Reflection.Metadata" Version="9.0.1" />
+    <PackageVersion Include="System.Resources.Extensions" Version="9.0.1" />
     <PackageVersion Include="System.Runtime.CompilerServices.Unsafe" Version="6.1.0" />
     <PackageVersion Include="TomsToolbox.Composition.MicrosoftExtensions" Version="2.21.0" />
     <PackageVersion Include="TomsToolbox.Wpf.Composition" Version="2.20.0" />
diff --git a/ICSharpCode.BamlDecompiler/packages.lock.json b/ICSharpCode.BamlDecompiler/packages.lock.json
index 758895528c..270124ff56 100644
--- a/ICSharpCode.BamlDecompiler/packages.lock.json
+++ b/ICSharpCode.BamlDecompiler/packages.lock.json
@@ -23,7 +23,7 @@
       },
       "System.Collections.Immutable": {
         "type": "CentralTransitive",
-        "requested": "[9.0.0, )",
+        "requested": "[9.0.1, )",
         "resolved": "6.0.0",
         "contentHash": "l4zZJ1WU2hqpQQHXz1rvC3etVZN+2DLmQMO79FhOTZHMn8tDRr+WU287sbomD0BETlmKDn0ygUgVy9k5xkkJdA==",
         "dependencies": {
@@ -32,7 +32,7 @@
       },
       "System.Reflection.Metadata": {
         "type": "CentralTransitive",
-        "requested": "[9.0.0, )",
+        "requested": "[9.0.1, )",
         "resolved": "6.0.0",
         "contentHash": "sffDOcex1C3HO5kDolOYcWXTwRpZY/LvJujM6SMjn63fWMJWchYAAmkoAJXlbpZ5yf4d+KMgxd+LeETa4gD9sQ==",
         "dependencies": {
diff --git a/ICSharpCode.Decompiler.Tests/Helpers/CodeAssert.cs b/ICSharpCode.Decompiler.Tests/Helpers/CodeAssert.cs
index a1e9c75058..bec46ae9d3 100644
--- a/ICSharpCode.Decompiler.Tests/Helpers/CodeAssert.cs
+++ b/ICSharpCode.Decompiler.Tests/Helpers/CodeAssert.cs
@@ -4,6 +4,7 @@
 using System.Linq;
 
 using DiffLib;
+using DiffLib.Alignment;
 
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp;
diff --git a/ICSharpCode.ILSpyCmd/packages.lock.json b/ICSharpCode.ILSpyCmd/packages.lock.json
index 0ffdf6bd2c..f0a7e81e42 100644
--- a/ICSharpCode.ILSpyCmd/packages.lock.json
+++ b/ICSharpCode.ILSpyCmd/packages.lock.json
@@ -367,8 +367,8 @@
           "ICSharpCode.Decompiler": "[8.0.0-noversion, )",
           "K4os.Compression.LZ4": "[1.3.8, )",
           "Mono.Cecil": "[0.11.6, )",
-          "System.Composition.AttributedModel": "[9.0.0, )",
-          "System.Reflection.Metadata": "[9.0.0, )",
+          "System.Composition.AttributedModel": "[9.0.1, )",
+          "System.Reflection.Metadata": "[9.0.1, )",
           "System.Runtime.CompilerServices.Unsafe": "[6.1.0, )"
         }
       },
@@ -423,23 +423,23 @@
       },
       "System.Collections.Immutable": {
         "type": "CentralTransitive",
-        "requested": "[9.0.0, )",
-        "resolved": "9.0.0",
-        "contentHash": "QhkXUl2gNrQtvPmtBTQHb0YsUrDiDQ2QS09YbtTTiSjGcf7NBqtYbrG/BE06zcBPCKEwQGzIv13IVdXNOSub2w=="
+        "requested": "[9.0.1, )",
+        "resolved": "9.0.1",
+        "contentHash": "qt4+ClsZYKzar/Rw1zbt0t9iuBUCLVNsjXicEuVQyKL7143CwhWzI2gTwzz8AhSaFYVHnpcb8SBGA+zaY4weUg=="
       },
       "System.Composition.AttributedModel": {
         "type": "CentralTransitive",
-        "requested": "[9.0.0, )",
-        "resolved": "9.0.0",
-        "contentHash": "iri00l/zIX9g4lHMY+Nz0qV1n40+jFYAmgsaiNn16xvt2RDwlqByNG4wgblagnDYxm3YSQQ0jLlC/7Xlk9CzyA=="
+        "requested": "[9.0.1, )",
+        "resolved": "9.0.1",
+        "contentHash": "dZYI+yQcn2dZGnN7Q/7H13VyKJKgMnr9uiJBLeiTJTojQdy+4Alo3T/bfpCBK3FxSksyYjU4uF7wKjkxWAiHQQ=="
       },
       "System.Reflection.Metadata": {
         "type": "CentralTransitive",
-        "requested": "[9.0.0, )",
-        "resolved": "9.0.0",
-        "contentHash": "ANiqLu3DxW9kol/hMmTWbt3414t9ftdIuiIU7j80okq2YzAueo120M442xk1kDJWtmZTqWQn7wHDvMRipVOEOQ==",
+        "requested": "[9.0.1, )",
+        "resolved": "9.0.1",
+        "contentHash": "XGkA0wiS4vbZu708VtlgSh40stW2ucDriDItkiJUnnp867x5HaBfmoTqdA00DYG0Ld7Kg0cLvEPkUEUxputgzQ==",
         "dependencies": {
-          "System.Collections.Immutable": "9.0.0"
+          "System.Collections.Immutable": "9.0.1"
         }
       },
       "System.Runtime.CompilerServices.Unsafe": {
diff --git a/ICSharpCode.ILSpyX/packages.lock.json b/ICSharpCode.ILSpyX/packages.lock.json
index 15b6aec8e7..21f8f1ee88 100644
--- a/ICSharpCode.ILSpyX/packages.lock.json
+++ b/ICSharpCode.ILSpyX/packages.lock.json
@@ -32,17 +32,17 @@
       },
       "System.Composition.AttributedModel": {
         "type": "Direct",
-        "requested": "[9.0.0, )",
-        "resolved": "9.0.0",
-        "contentHash": "iri00l/zIX9g4lHMY+Nz0qV1n40+jFYAmgsaiNn16xvt2RDwlqByNG4wgblagnDYxm3YSQQ0jLlC/7Xlk9CzyA=="
+        "requested": "[9.0.1, )",
+        "resolved": "9.0.1",
+        "contentHash": "dZYI+yQcn2dZGnN7Q/7H13VyKJKgMnr9uiJBLeiTJTojQdy+4Alo3T/bfpCBK3FxSksyYjU4uF7wKjkxWAiHQQ=="
       },
       "System.Reflection.Metadata": {
         "type": "Direct",
-        "requested": "[9.0.0, )",
-        "resolved": "9.0.0",
-        "contentHash": "ANiqLu3DxW9kol/hMmTWbt3414t9ftdIuiIU7j80okq2YzAueo120M442xk1kDJWtmZTqWQn7wHDvMRipVOEOQ==",
+        "requested": "[9.0.1, )",
+        "resolved": "9.0.1",
+        "contentHash": "XGkA0wiS4vbZu708VtlgSh40stW2ucDriDItkiJUnnp867x5HaBfmoTqdA00DYG0Ld7Kg0cLvEPkUEUxputgzQ==",
         "dependencies": {
-          "System.Collections.Immutable": "9.0.0"
+          "System.Collections.Immutable": "9.0.1"
         }
       },
       "System.Runtime.CompilerServices.Unsafe": {
@@ -76,9 +76,9 @@
       },
       "System.Collections.Immutable": {
         "type": "CentralTransitive",
-        "requested": "[9.0.0, )",
-        "resolved": "9.0.0",
-        "contentHash": "QhkXUl2gNrQtvPmtBTQHb0YsUrDiDQ2QS09YbtTTiSjGcf7NBqtYbrG/BE06zcBPCKEwQGzIv13IVdXNOSub2w=="
+        "requested": "[9.0.1, )",
+        "resolved": "9.0.1",
+        "contentHash": "qt4+ClsZYKzar/Rw1zbt0t9iuBUCLVNsjXicEuVQyKL7143CwhWzI2gTwzz8AhSaFYVHnpcb8SBGA+zaY4weUg=="
       }
     }
   }