diff --git a/src/ProtoBuf.Data.Net20/ProtoBuf.Data.Net20.csproj b/src/ProtoBuf.Data.Net20/ProtoBuf.Data.Net20.csproj
index 30e1d5d..f279d05 100644
--- a/src/ProtoBuf.Data.Net20/ProtoBuf.Data.Net20.csproj
+++ b/src/ProtoBuf.Data.Net20/ProtoBuf.Data.Net20.csproj
@@ -42,9 +42,9 @@
     <AssemblyOriginatorKeyFile>ProtoBuf.Data.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="protobuf-net, Version=2.0.0.621, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
+    <Reference Include="protobuf-net, Version=2.0.0.640, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\..\packages\protobuf-net.2.0.0.621\lib\net20\protobuf-net.dll</HintPath>
+      <HintPath>..\..\packages\protobuf-net.2.0.0.640\lib\net20\protobuf-net.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Data" />
diff --git a/src/ProtoBuf.Data.Net20/packages.config b/src/ProtoBuf.Data.Net20/packages.config
index db08285..d9f2099 100644
--- a/src/ProtoBuf.Data.Net20/packages.config
+++ b/src/ProtoBuf.Data.Net20/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="protobuf-net" version="2.0.0.621" targetFramework="net20" />
+  <package id="protobuf-net" version="2.0.0.640" targetFramework="net20" />
 </packages>
\ No newline at end of file
diff --git a/src/ProtoBuf.Data.Net30/ProtoBuf.Data.Net30.csproj b/src/ProtoBuf.Data.Net30/ProtoBuf.Data.Net30.csproj
index c894e71..f5a5f74 100644
--- a/src/ProtoBuf.Data.Net30/ProtoBuf.Data.Net30.csproj
+++ b/src/ProtoBuf.Data.Net30/ProtoBuf.Data.Net30.csproj
@@ -42,9 +42,9 @@
     <AssemblyOriginatorKeyFile>ProtoBuf.Data.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="protobuf-net, Version=2.0.0.621, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
+    <Reference Include="protobuf-net, Version=2.0.0.640, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\..\packages\protobuf-net.2.0.0.621\lib\net30\protobuf-net.dll</HintPath>
+      <HintPath>..\..\packages\protobuf-net.2.0.0.640\lib\net30\protobuf-net.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Data" />
diff --git a/src/ProtoBuf.Data.Net30/packages.config b/src/ProtoBuf.Data.Net30/packages.config
index 0ce0b42..ed80ada 100644
--- a/src/ProtoBuf.Data.Net30/packages.config
+++ b/src/ProtoBuf.Data.Net30/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="protobuf-net" version="2.0.0.621" targetFramework="net30" />
+  <package id="protobuf-net" version="2.0.0.640" targetFramework="net30" />
 </packages>
\ No newline at end of file
diff --git a/src/ProtoBuf.Data.Net35/ProtoBuf.Data.Net35.csproj b/src/ProtoBuf.Data.Net35/ProtoBuf.Data.Net35.csproj
index 547bb60..da4cd0a 100644
--- a/src/ProtoBuf.Data.Net35/ProtoBuf.Data.Net35.csproj
+++ b/src/ProtoBuf.Data.Net35/ProtoBuf.Data.Net35.csproj
@@ -43,9 +43,9 @@
     <AssemblyOriginatorKeyFile>ProtoBuf.Data.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="protobuf-net, Version=2.0.0.621, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
+    <Reference Include="protobuf-net, Version=2.0.0.640, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\..\packages\protobuf-net.2.0.0.621\lib\net35\protobuf-net.dll</HintPath>
+      <HintPath>..\..\packages\protobuf-net.2.0.0.640\lib\net35\protobuf-net.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Data" />
diff --git a/src/ProtoBuf.Data.Net35/packages.config b/src/ProtoBuf.Data.Net35/packages.config
index e488b3b..a4dbea1 100644
--- a/src/ProtoBuf.Data.Net35/packages.config
+++ b/src/ProtoBuf.Data.Net35/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="protobuf-net" version="2.0.0.621" targetFramework="net35" />
+  <package id="protobuf-net" version="2.0.0.640" targetFramework="net35" />
 </packages>
\ No newline at end of file
diff --git a/src/ProtoBuf.Data.Net40/ProtoBuf.Data.Net40.csproj b/src/ProtoBuf.Data.Net40/ProtoBuf.Data.Net40.csproj
index 1fcdb37..44730e7 100644
--- a/src/ProtoBuf.Data.Net40/ProtoBuf.Data.Net40.csproj
+++ b/src/ProtoBuf.Data.Net40/ProtoBuf.Data.Net40.csproj
@@ -42,9 +42,9 @@
     <AssemblyOriginatorKeyFile>ProtoBuf.Data.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="protobuf-net, Version=2.0.0.621, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
+    <Reference Include="protobuf-net, Version=2.0.0.640, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\..\packages\protobuf-net.2.0.0.621\lib\net40\protobuf-net.dll</HintPath>
+      <HintPath>..\..\packages\protobuf-net.2.0.0.640\lib\net40\protobuf-net.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Data" />
diff --git a/src/ProtoBuf.Data.Net40/packages.config b/src/ProtoBuf.Data.Net40/packages.config
index 65fd4a5..e0a2084 100644
--- a/src/ProtoBuf.Data.Net40/packages.config
+++ b/src/ProtoBuf.Data.Net40/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="protobuf-net" version="2.0.0.621" targetFramework="net40" />
+  <package id="protobuf-net" version="2.0.0.640" targetFramework="net40" />
 </packages>
\ No newline at end of file
diff --git a/src/ProtoBuf.Data.Net45/ProtoBuf.Data.Net45.csproj b/src/ProtoBuf.Data.Net45/ProtoBuf.Data.Net45.csproj
index 7312701..f700b79 100644
--- a/src/ProtoBuf.Data.Net45/ProtoBuf.Data.Net45.csproj
+++ b/src/ProtoBuf.Data.Net45/ProtoBuf.Data.Net45.csproj
@@ -40,9 +40,9 @@
     <AssemblyOriginatorKeyFile>ProtoBuf.Data.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="protobuf-net, Version=2.0.0.621, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
+    <Reference Include="protobuf-net, Version=2.0.0.640, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\..\packages\protobuf-net.2.0.0.621\lib\net40\protobuf-net.dll</HintPath>
+      <HintPath>..\..\packages\protobuf-net.2.0.0.640\lib\net40\protobuf-net.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
diff --git a/src/ProtoBuf.Data.Net45/packages.config b/src/ProtoBuf.Data.Net45/packages.config
index bb2545c..1b5ae6e 100644
--- a/src/ProtoBuf.Data.Net45/packages.config
+++ b/src/ProtoBuf.Data.Net45/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="protobuf-net" version="2.0.0.621" targetFramework="net45" />
+  <package id="protobuf-net" version="2.0.0.640" targetFramework="net45" />
 </packages>
\ No newline at end of file