diff --git a/ICSharpCode.Decompiler.Console/ICSharpCode.Decompiler.Console.csproj b/ICSharpCode.Decompiler.Console/ICSharpCode.Decompiler.Console.csproj
index b28f0d507..4d75e4483 100644
--- a/ICSharpCode.Decompiler.Console/ICSharpCode.Decompiler.Console.csproj
+++ b/ICSharpCode.Decompiler.Console/ICSharpCode.Decompiler.Console.csproj
@@ -27,6 +27,8 @@
     <WarningsAsErrors>NU1605</WarningsAsErrors>
   </PropertyGroup>
 
+  <Import Project="..\packages.props" />
+
   <ItemGroup>
     <Compile Include="..\ICSharpCode.Decompiler.PdbProvider.Cecil\MonoCecilDebugInfoProvider.cs" Link="MonoCecilDebugInfoProvider.cs" />
     <Compile Include="..\ILSpy\DebugInfo\PortableDebugInfoProvider.cs" Link="PortableDebugInfoProvider.cs" />
@@ -52,7 +54,7 @@
     <PackageReference Include="System.Runtime.Handles" Version="4.3.0" />
     <PackageReference Include="System.Runtime.InteropServices" Version="4.3.0" />
     <PackageReference Include="System.Text.Encoding.Extensions" Version="4.3.0" />
-    <PackageReference Include="Mono.Cecil" Version="0.10.3" />
+    <PackageReference Include="Mono.Cecil" Version="$(MonoCecilVersion)" />
   </ItemGroup>
 
 </Project>
diff --git a/ICSharpCode.Decompiler.PdbProvider.Cecil/ICSharpCode.Decompiler.PdbProvider.Cecil.csproj b/ICSharpCode.Decompiler.PdbProvider.Cecil/ICSharpCode.Decompiler.PdbProvider.Cecil.csproj
index 9095307ee..4993983fd 100644
--- a/ICSharpCode.Decompiler.PdbProvider.Cecil/ICSharpCode.Decompiler.PdbProvider.Cecil.csproj
+++ b/ICSharpCode.Decompiler.PdbProvider.Cecil/ICSharpCode.Decompiler.PdbProvider.Cecil.csproj
@@ -6,8 +6,10 @@
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 
+  <Import Project="..\packages.props" />
+
   <ItemGroup>
-    <PackageReference Include="Mono.Cecil" Version="0.10.3" />
+    <PackageReference Include="Mono.Cecil" Version="$(MonoCecilVersion)" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/ICSharpCode.Decompiler.PowerShell/ICSharpCode.Decompiler.PowerShell.csproj b/ICSharpCode.Decompiler.PowerShell/ICSharpCode.Decompiler.PowerShell.csproj
index f6bb57e7a..2c465d762 100644
--- a/ICSharpCode.Decompiler.PowerShell/ICSharpCode.Decompiler.PowerShell.csproj
+++ b/ICSharpCode.Decompiler.PowerShell/ICSharpCode.Decompiler.PowerShell.csproj
@@ -7,9 +7,11 @@
     <RootNamespace>ICSharpCode.Decompiler.PowerShell</RootNamespace>
   </PropertyGroup>
 
+  <Import Project="..\packages.props" />
+
   <ItemGroup>
     <PackageReference Include="PowerShellStandard.Library" Version="5.1.0" />
-    <PackageReference Include="Mono.Cecil" Version="0.10.3" />
+    <PackageReference Include="Mono.Cecil" Version="$(MonoCecilVersion)" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(Configuration)' == 'Debug'">
diff --git a/ICSharpCode.Decompiler.Tests/ICSharpCode.Decompiler.Tests.csproj b/ICSharpCode.Decompiler.Tests/ICSharpCode.Decompiler.Tests.csproj
index 7044604bf..457108596 100644
--- a/ICSharpCode.Decompiler.Tests/ICSharpCode.Decompiler.Tests.csproj
+++ b/ICSharpCode.Decompiler.Tests/ICSharpCode.Decompiler.Tests.csproj
@@ -39,16 +39,20 @@
     <DefineConstants>TRACE;NET46;ROSLYN;CS60;CS70;CS71;CS72;CS73</DefineConstants>
   </PropertyGroup>
 
+  <Import Project="..\packages.props" />
+
   <ItemGroup>
-    <PackageReference Include="DiffLib" Version="2017.7.26.1241" />
+    <PackageReference Include="DiffLib" Version="$(DiffLibVersion)" />
     <PackageReference Include="Microsoft.Build.Locator" Version="1.2.2" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.8.0-3.final" />
-    <PackageReference Include="Microsoft.CodeAnalysis.VisualBasic" Version="3.8.0-3.final" />
+    <PackageReference Include="System.Collections.Immutable" Version="$(SystemCollectionsImmutableVersion)" />
+    <PackageReference Include="System.Reflection.Metadata" Version="$(SystemReflectionMetadataVersion)" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="$(RoslynVersion)" />
+    <PackageReference Include="Microsoft.CodeAnalysis.VisualBasic" Version="$(RoslynVersion)" />
     <PackageReference Include="Microsoft.DiaSymReader.Converter.Xml" Version="1.1.0-beta1-63314-01" />
-    <PackageReference Include="NUnit3TestAdapter" Version="3.13.0" />
-    <PackageReference Include="NUnit" Version="3.12.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="$(NUnitAdapterVersion)" />
+    <PackageReference Include="NUnit" Version="$(NUnitVersion)" />
     <PackageReference Include="System.Memory" Version="4.5.4" />
-    <PackageReference Include="Mono.Cecil" Version="0.10.3" />
+    <PackageReference Include="Mono.Cecil" Version="$(MonoCecilVersion)" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/ICSharpCode.Decompiler/ICSharpCode.Decompiler.csproj b/ICSharpCode.Decompiler/ICSharpCode.Decompiler.csproj
index 690a4d0f4..915e5939f 100644
--- a/ICSharpCode.Decompiler/ICSharpCode.Decompiler.csproj
+++ b/ICSharpCode.Decompiler/ICSharpCode.Decompiler.csproj
@@ -20,7 +20,7 @@
     <AssemblyOriginatorKeyFile>ICSharpCode.Decompiler.snk</AssemblyOriginatorKeyFile>
     <NoWarn>1701;1702;1591;1573</NoWarn>
   </PropertyGroup>
-  
+
   <!-- HACK: Disable package generation on Unix due to tooling issues. -->
   <PropertyGroup Condition=" '$(OS)' == 'Windows_NT' ">
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
@@ -46,10 +46,12 @@
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 
+  <Import Project="..\packages.props" />
+
   <ItemGroup>
-    <PackageReference Include="Humanizer.Core" Version="2.2.0" />
-    <PackageReference Include="System.Collections.Immutable" Version="5.0.0-preview.8.20371.14" />
-    <PackageReference Include="System.Reflection.Metadata" Version="5.0.0-preview.8.20371.14" />
+    <PackageReference Include="Humanizer.Core" Version="$(HumanizerVersion)" />
+    <PackageReference Include="System.Collections.Immutable" Version="$(SystemCollectionsImmutableVersion)" />
+    <PackageReference Include="System.Reflection.Metadata" Version="$(SystemReflectionMetadataVersion)" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
@@ -661,5 +663,5 @@
     <Exec WorkingDirectory=".." Command="$(UpdateAssemblyInfo)" Timeout="60000" Condition="'$(CommitHash)'!='$(LastCommitHash)'" />
     <WriteLinesToFile Lines="$(CommitHash)" File="@(UpdateAssemblyInfoStamp)" Overwrite="true" Condition="'$(CommitHash)'!='$(LastCommitHash)'" />
   </Target>
-  
-</Project>
\ No newline at end of file
+
+</Project>
diff --git a/ILSpy.AddIn/ILSpy.AddIn.csproj b/ILSpy.AddIn/ILSpy.AddIn.csproj
index a5471e387..6c4096184 100644
--- a/ILSpy.AddIn/ILSpy.AddIn.csproj
+++ b/ILSpy.AddIn/ILSpy.AddIn.csproj
@@ -41,12 +41,15 @@
     <Reference Include="System.Design" />
   </ItemGroup>
 
+  <Import Project="..\packages.props" />
+
   <ItemGroup>
     <PackageReference Include="Microsoft.VisualStudio.SDK " Version="15.9.3" />
+    <!-- Intentionally using an old Roslyn version in the AddIn, so that we stay compatible with old VS versions. -->
     <PackageReference Include="Microsoft.CodeAnalysis" Version="2.4.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="2.4.0" />
     <PackageReference Include="Microsoft.VisualStudio.LanguageServices" Version="2.4.0" />
-    <PackageReference Include="Mono.Cecil" Version="0.10.3" />
+    <PackageReference Include="Mono.Cecil" Version="$(MonoCecilVersion)" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/ILSpy.BamlDecompiler.Tests/ILSpy.BamlDecompiler.Tests.csproj b/ILSpy.BamlDecompiler.Tests/ILSpy.BamlDecompiler.Tests.csproj
index 45169e45d..a5de695a7 100644
--- a/ILSpy.BamlDecompiler.Tests/ILSpy.BamlDecompiler.Tests.csproj
+++ b/ILSpy.BamlDecompiler.Tests/ILSpy.BamlDecompiler.Tests.csproj
@@ -34,8 +34,10 @@
     <Reference Include="WindowsBase" />
   </ItemGroup>
 
+  <Import Project="..\packages.props" />
+
   <ItemGroup>
-    <PackageReference Include="NUnit" Version="3.12.0" />
+    <PackageReference Include="NUnit" Version="$(NUnitVersion)" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/ILSpy.BamlDecompiler/ILSpy.BamlDecompiler.csproj b/ILSpy.BamlDecompiler/ILSpy.BamlDecompiler.csproj
index 703e7fe45..d501102bd 100644
--- a/ILSpy.BamlDecompiler/ILSpy.BamlDecompiler.csproj
+++ b/ILSpy.BamlDecompiler/ILSpy.BamlDecompiler.csproj
@@ -35,8 +35,10 @@
     <Reference Include="WindowsBase" />
   </ItemGroup>
 
+  <Import Project="..\packages.props" />
+
   <ItemGroup>
-    <PackageReference Include="AvalonEdit" Version="6.1.0-preview1" />
+    <PackageReference Include="AvalonEdit" Version="$(AvalonEditVersion)" />
     <PackageReference Include="System.Composition" Version="1.3.0" />
   </ItemGroup>
 
diff --git a/ILSpy.Tests/ILSpy.Tests.csproj b/ILSpy.Tests/ILSpy.Tests.csproj
index 21d0dc217..7ce20e599 100644
--- a/ILSpy.Tests/ILSpy.Tests.csproj
+++ b/ILSpy.Tests/ILSpy.Tests.csproj
@@ -44,13 +44,17 @@
     <Compile Include="Stub.cs" />
   </ItemGroup>
 
+  <Import Project="..\packages.props" />
+
   <ItemGroup>
-    <PackageReference Include="DiffLib" Version="2017.7.26.1241" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.8.0-3.final" />
-    <PackageReference Include="Microsoft.CodeAnalysis.VisualBasic" Version="3.8.0-3.final" />
-    <PackageReference Include="NUnit3TestAdapter" Version="3.13.0" />
-    <PackageReference Include="NUnit" Version="3.11.0" />
-    <PackageReference Include="Moq" Version="4.14.1" />
+    <PackageReference Include="DiffLib" Version="$(DiffLibVersion)" />
+    <PackageReference Include="System.Collections.Immutable" Version="$(SystemCollectionsImmutableVersion)" />
+    <PackageReference Include="System.Reflection.Metadata" Version="$(SystemReflectionMetadataVersion)" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="$(RoslynVersion)" />
+    <PackageReference Include="Microsoft.CodeAnalysis.VisualBasic" Version="$(RoslynVersion)" />
+    <PackageReference Include="NUnit3TestAdapter" Version="$(NUnitAdapterVersion)" />
+    <PackageReference Include="NUnit" Version="$(NUnitVersion)" />
+    <PackageReference Include="Moq" Version="$(MoqVersion)" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/ILSpy/ILSpy.csproj b/ILSpy/ILSpy.csproj
index 9a99cd65d..9e90df629 100644
--- a/ILSpy/ILSpy.csproj
+++ b/ILSpy/ILSpy.csproj
@@ -48,12 +48,14 @@
     <Reference Include="WindowsBase" />
   </ItemGroup>
 
+  <Import Project="..\packages.props" />
+
   <ItemGroup>
-    <PackageReference Include="AvalonEdit" Version="6.1.0-preview1" />
+    <PackageReference Include="AvalonEdit" Version="$(AvalonEditVersion)" />
     <PackageReference Include="Dirkster.AvalonDock" Version="3.6.1" />
     <PackageReference Include="Microsoft.VisualStudio.Composition" Version="16.3.7" />
     <PackageReference Include="System.Composition" Version="1.3.0" />
-    <PackageReference Include="Mono.Cecil" Version="0.10.3" />
+    <PackageReference Include="Mono.Cecil" Version="$(MonoCecilVersion)" />
     <PackageReference Include="OSVersionHelper" Version="1.0.11" />
     <PackageReference Include="DataGridExtensions" Version="2.1.1" />
     <PackageReference Include="Microsoft.Xaml.Behaviors.Wpf" Version="1.1.19" />
diff --git a/packages.props b/packages.props
new file mode 100644
index 000000000..355dc665a
--- /dev/null
+++ b/packages.props
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project>
+  <!-- Centrally define the versions of the NuGet packages we use -->
+  <PropertyGroup>
+    <HumanizerVersion>2.2.0</HumanizerVersion>
+    <SystemCollectionsImmutableVersion>5.0.0-preview.8.20407.11</SystemCollectionsImmutableVersion>
+    <SystemReflectionMetadataVersion>5.0.0-preview.8.20407.11</SystemReflectionMetadataVersion>
+    <RoslynVersion>3.8.0-3.final</RoslynVersion>
+    <MonoCecilVersion>0.10.3</MonoCecilVersion>
+    <AvalonEditVersion>6.1.0-preview1</AvalonEditVersion>
+    <NUnitVersion>3.12.0</NUnitVersion>
+    <NUnitAdapterVersion>3.13.0</NUnitAdapterVersion>
+    <MoqVersion>4.14.1</MoqVersion>
+    <DiffLibVersion>2017.7.26.1241</DiffLibVersion>
+  </PropertyGroup>
+</Project>