diff --git a/Capnp.Net.Runtime/Capnp.Net.Runtime.csproj b/Capnp.Net.Runtime/Capnp.Net.Runtime.csproj
index 2d6ac0e..bb63b16 100644
--- a/Capnp.Net.Runtime/Capnp.Net.Runtime.csproj
+++ b/Capnp.Net.Runtime/Capnp.Net.Runtime.csproj
@@ -18,7 +18,7 @@
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <RepositoryType>Git</RepositoryType>
     <PackageTags>capnp "Cap'n Proto" RPC serialization cerealization</PackageTags>
-    <Version>1.3-local$([System.DateTime]::UtcNow.ToString(yyMMddHHmm))</Version>
+    <Version>1.2-local$([System.DateTime]::UtcNow.ToString(yyMMddHHmm))</Version>
     <Configurations>Debug;Release</Configurations>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
   </PropertyGroup>
diff --git a/CapnpC.CSharp.MsBuild.Generation/CapnpC.CSharp.MsBuild.Generation.csproj b/CapnpC.CSharp.MsBuild.Generation/CapnpC.CSharp.MsBuild.Generation.csproj
index c2aa0e7..3f7d27f 100644
--- a/CapnpC.CSharp.MsBuild.Generation/CapnpC.CSharp.MsBuild.Generation.csproj
+++ b/CapnpC.CSharp.MsBuild.Generation/CapnpC.CSharp.MsBuild.Generation.csproj
@@ -9,9 +9,9 @@
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>
-    <AssemblyVersion>1.3.0.0</AssemblyVersion>
-    <FileVersion>1.3.0.0</FileVersion>
-    <Version>1.3-local$([System.DateTime]::UtcNow.ToString(yyMMddHHmm))</Version>
+    <AssemblyVersion>1.2.0.0</AssemblyVersion>
+    <FileVersion>1.2.0.0</FileVersion>
+    <Version>1.2-local$([System.DateTime]::UtcNow.ToString(yyMMddHHmm))</Version>
     
     <NuspecFile>$(MSBuildThisFileDirectory)CapnpC.CSharp.MsBuild.Generation.nuspec</NuspecFile>
     <NuspecProperties>version=$(Version);configuration=$(Configuration)</NuspecProperties>
diff --git a/MsBuildGenerationTest/MsBuildGenerationTest.csproj b/MsBuildGenerationTest/MsBuildGenerationTest.csproj
index c415422..3c7c246 100644
--- a/MsBuildGenerationTest/MsBuildGenerationTest.csproj
+++ b/MsBuildGenerationTest/MsBuildGenerationTest.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp2.2</TargetFramework>
-    <Version>1.3-local</Version>
+    <Version>1.2-local</Version>
     <Configurations>Debug;Release</Configurations>
     <PackageReferenceVersion Condition="'$(PackageReferenceVersion)'==''">$(Version)*</PackageReferenceVersion>
   </PropertyGroup>
diff --git a/appveyor.yml b/appveyor.yml
index bfbe4fb..b18d96d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: '1.3.{build}'
+version: '1.2.{build}'
 image: Visual Studio 2019
 # branches:
 #  only:
diff --git a/capnpc-csharp/capnpc-csharp.csproj b/capnpc-csharp/capnpc-csharp.csproj
index f5088f0..373c3a3 100644
--- a/capnpc-csharp/capnpc-csharp.csproj
+++ b/capnpc-csharp/capnpc-csharp.csproj
@@ -13,7 +13,7 @@
     <PackageProjectUrl>https://github.com/c80k/capnproto-dotnetcore</PackageProjectUrl>
     <RepositoryType>Git</RepositoryType>
     <PackageTags>capnp capnpc RPC serialization cerealization</PackageTags>
-    <Version>1.3.0</Version>
+    <Version>1.2.0</Version>
     <Configurations>Debug;Release</Configurations>
   </PropertyGroup>