diff --git a/ICSharpCode.BamlDecompiler/packages.lock.json b/ICSharpCode.BamlDecompiler/packages.lock.json
index b891d214a..f4e596065 100644
--- a/ICSharpCode.BamlDecompiler/packages.lock.json
+++ b/ICSharpCode.BamlDecompiler/packages.lock.json
@@ -17,24 +17,33 @@
       "icsharpcode.decompiler": {
         "type": "Project",
         "dependencies": {
-          "System.Collections.Immutable": "[10.0.0-preview.3.25171.5, )",
-          "System.Reflection.Metadata": "[10.0.0-preview.3.25171.5, )"
+          "System.Collections.Immutable": "[6.0.0, )",
+          "System.Reflection.Metadata": "[6.0.0, )"
         }
       },
       "System.Collections.Immutable": {
         "type": "CentralTransitive",
         "requested": "[10.0.0-preview.3.25171.5, )",
-        "resolved": "10.0.0-preview.3.25171.5",
-        "contentHash": "7EVfTaDkWy2g0uHIAtOzylYwb/T/khQEPUMfgqTxviPjH+9Aqm/Qnrf+nzLzGdgfV8o3UXFgI7iJUM4ZHxH2hQ=="
+        "resolved": "6.0.0",
+        "contentHash": "l4zZJ1WU2hqpQQHXz1rvC3etVZN+2DLmQMO79FhOTZHMn8tDRr+WU287sbomD0BETlmKDn0ygUgVy9k5xkkJdA==",
+        "dependencies": {
+          "System.Runtime.CompilerServices.Unsafe": "6.0.0"
+        }
       },
       "System.Reflection.Metadata": {
         "type": "CentralTransitive",
         "requested": "[10.0.0-preview.3.25171.5, )",
-        "resolved": "10.0.0-preview.3.25171.5",
-        "contentHash": "+vmMtMSXPQTYqaHoLgWcd39Pwb7yGD4sCewmvVrdNzziRCBxjf6/DK8XCWzELxNsLhOmViZ4LIIr+uPa6K5pRw==",
+        "resolved": "6.0.0",
+        "contentHash": "sffDOcex1C3HO5kDolOYcWXTwRpZY/LvJujM6SMjn63fWMJWchYAAmkoAJXlbpZ5yf4d+KMgxd+LeETa4gD9sQ==",
         "dependencies": {
-          "System.Collections.Immutable": "10.0.0-preview.3.25171.5"
+          "System.Collections.Immutable": "6.0.0"
         }
+      },
+      "System.Runtime.CompilerServices.Unsafe": {
+        "type": "CentralTransitive",
+        "requested": "[6.1.2, )",
+        "resolved": "6.0.0",
+        "contentHash": "/iUeP3tq1S0XdNNoMz5C9twLSrM/TH+qElHkXWaPvuNOt+99G75NrV0OS2EqHx5wMN7popYjpc8oTjC1y16DLg=="
       }
     }
   }
diff --git a/ICSharpCode.Decompiler/ICSharpCode.Decompiler.csproj b/ICSharpCode.Decompiler/ICSharpCode.Decompiler.csproj
index 53a45507c..23a46a09a 100644
--- a/ICSharpCode.Decompiler/ICSharpCode.Decompiler.csproj
+++ b/ICSharpCode.Decompiler/ICSharpCode.Decompiler.csproj
@@ -84,8 +84,8 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="System.Collections.Immutable" Version="10.0.0-preview.3.25171.5" />
-    <PackageReference Include="System.Reflection.Metadata" Version="10.0.0-preview.3.25171.5" />
+    <PackageReference Include="System.Collections.Immutable" Version="6.0.0" />
+    <PackageReference Include="System.Reflection.Metadata" Version="6.0.0" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/ICSharpCode.Decompiler/packages.lock.json b/ICSharpCode.Decompiler/packages.lock.json
index 356272070..e44c80edb 100644
--- a/ICSharpCode.Decompiler/packages.lock.json
+++ b/ICSharpCode.Decompiler/packages.lock.json
@@ -29,22 +29,21 @@
       },
       "System.Collections.Immutable": {
         "type": "Direct",
-        "requested": "[10.0.0-preview.3.25171.5, )",
-        "resolved": "10.0.0-preview.3.25171.5",
-        "contentHash": "7EVfTaDkWy2g0uHIAtOzylYwb/T/khQEPUMfgqTxviPjH+9Aqm/Qnrf+nzLzGdgfV8o3UXFgI7iJUM4ZHxH2hQ==",
+        "requested": "[6.0.0, )",
+        "resolved": "6.0.0",
+        "contentHash": "l4zZJ1WU2hqpQQHXz1rvC3etVZN+2DLmQMO79FhOTZHMn8tDRr+WU287sbomD0BETlmKDn0ygUgVy9k5xkkJdA==",
         "dependencies": {
-          "System.Memory": "4.6.0",
-          "System.Runtime.CompilerServices.Unsafe": "6.1.0"
+          "System.Memory": "4.5.4",
+          "System.Runtime.CompilerServices.Unsafe": "6.0.0"
         }
       },
       "System.Reflection.Metadata": {
         "type": "Direct",
-        "requested": "[10.0.0-preview.3.25171.5, )",
-        "resolved": "10.0.0-preview.3.25171.5",
-        "contentHash": "+vmMtMSXPQTYqaHoLgWcd39Pwb7yGD4sCewmvVrdNzziRCBxjf6/DK8XCWzELxNsLhOmViZ4LIIr+uPa6K5pRw==",
+        "requested": "[6.0.0, )",
+        "resolved": "6.0.0",
+        "contentHash": "sffDOcex1C3HO5kDolOYcWXTwRpZY/LvJujM6SMjn63fWMJWchYAAmkoAJXlbpZ5yf4d+KMgxd+LeETa4gD9sQ==",
         "dependencies": {
-          "System.Collections.Immutable": "10.0.0-preview.3.25171.5",
-          "System.Memory": "4.6.0"
+          "System.Collections.Immutable": "6.0.0"
         }
       },
       "TunnelVisionLabs.ReferenceAssemblyAnnotator": {
@@ -70,28 +69,28 @@
       },
       "System.Buffers": {
         "type": "Transitive",
-        "resolved": "4.6.0",
-        "contentHash": "lN6tZi7Q46zFzAbRYXTIvfXcyvQQgxnY7Xm6C6xQ9784dEL1amjM6S6Iw4ZpsvesAKnRVsM4scrDQaDqSClkjA=="
+        "resolved": "4.5.1",
+        "contentHash": "Rw7ijyl1qqRS0YQD/WycNst8hUUMgrMH4FCn1nNm27M4VxchZ1js3fVjQaANHO5f3sN4isvP4a+Met9Y4YomAg=="
       },
       "System.Memory": {
         "type": "Transitive",
-        "resolved": "4.6.0",
-        "contentHash": "OEkbBQoklHngJ8UD8ez2AERSk2g+/qpAaSWWCBFbpH727HxDq5ydVkuncBaKcKfwRqXGWx64dS6G1SUScMsitg==",
+        "resolved": "4.5.4",
+        "contentHash": "1MbJTHS1lZ4bS4FmsJjnuGJOu88ZzTT2rLvrhW7Ygic+pC0NWA+3hgAen0HRdsocuQXCkUTdFn9yHJJhsijDXw==",
         "dependencies": {
-          "System.Buffers": "4.6.0",
-          "System.Numerics.Vectors": "4.6.0",
-          "System.Runtime.CompilerServices.Unsafe": "6.1.0"
+          "System.Buffers": "4.5.1",
+          "System.Numerics.Vectors": "4.4.0",
+          "System.Runtime.CompilerServices.Unsafe": "4.5.3"
         }
       },
       "System.Numerics.Vectors": {
         "type": "Transitive",
-        "resolved": "4.6.0",
-        "contentHash": "t+SoieZsRuEyiw/J+qXUbolyO219tKQQI0+2/YI+Qv7YdGValA6WiuokrNKqjrTNsy5ABWU11bdKOzUdheteXg=="
+        "resolved": "4.4.0",
+        "contentHash": "UiLzLW+Lw6HLed1Hcg+8jSRttrbuXv7DANVj0DkL9g6EnnzbL75EB7EWsw5uRbhxd/4YdG8li5XizGWepmG3PQ=="
       },
       "System.Runtime.CompilerServices.Unsafe": {
         "type": "Transitive",
-        "resolved": "6.1.0",
-        "contentHash": "5o/HZxx6RVqYlhKSq8/zronDkALJZUT2Vz0hx43f0gwe8mwlM0y2nYlqdBwLMzr262Bwvpikeb/yEwkAa5PADg=="
+        "resolved": "6.0.0",
+        "contentHash": "/iUeP3tq1S0XdNNoMz5C9twLSrM/TH+qElHkXWaPvuNOt+99G75NrV0OS2EqHx5wMN7popYjpc8oTjC1y16DLg=="
       }
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diff --git a/ICSharpCode.ILSpyCmd/packages.lock.json b/ICSharpCode.ILSpyCmd/packages.lock.json
index 6148c0605..be62bf516 100644
--- a/ICSharpCode.ILSpyCmd/packages.lock.json
+++ b/ICSharpCode.ILSpyCmd/packages.lock.json
@@ -358,8 +358,8 @@
       "icsharpcode.decompiler": {
         "type": "Project",
         "dependencies": {
-          "System.Collections.Immutable": "[10.0.0-preview.3.25171.5, )",
-          "System.Reflection.Metadata": "[10.0.0-preview.3.25171.5, )"
+          "System.Collections.Immutable": "[6.0.0, )",
+          "System.Reflection.Metadata": "[6.0.0, )"
         }
       },
       "icsharpcode.ilspyx": {
diff --git a/ICSharpCode.ILSpyX/packages.lock.json b/ICSharpCode.ILSpyX/packages.lock.json
index 89590854f..0f162b64f 100644
--- a/ICSharpCode.ILSpyX/packages.lock.json
+++ b/ICSharpCode.ILSpyX/packages.lock.json
@@ -70,8 +70,8 @@
       "icsharpcode.decompiler": {
         "type": "Project",
         "dependencies": {
-          "System.Collections.Immutable": "[10.0.0-preview.3.25171.5, )",
-          "System.Reflection.Metadata": "[10.0.0-preview.3.25171.5, )"
+          "System.Collections.Immutable": "[6.0.0, )",
+          "System.Reflection.Metadata": "[6.0.0, )"
         }
       },
       "System.Collections.Immutable": {