diff --git a/src/ProtoBuf.Data.Net20/ProtoBuf.Data.Net20.csproj b/src/ProtoBuf.Data.Net20/ProtoBuf.Data.Net20.csproj
index 8fbbba9..3054423 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=2.0.0.666, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
+    <Reference Include="protobuf-net, Version=2.0.0.668, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\..\packages\protobuf-net.2.0.0.666\lib\net20\protobuf-net.dll</HintPath>
+      <HintPath>..\..\packages\protobuf-net.2.0.0.668\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 7153631..dfecc8d 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="2.0.0.666" targetFramework="net20" />
+  <package id="protobuf-net" version="2.0.0.668" 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 d412ad1..6f02c96 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=2.0.0.666, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
+    <Reference Include="protobuf-net, Version=2.0.0.668, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\..\packages\protobuf-net.2.0.0.666\lib\net30\protobuf-net.dll</HintPath>
+      <HintPath>..\..\packages\protobuf-net.2.0.0.668\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 dd9e295..b23bb56 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="2.0.0.666" targetFramework="net30" />
+  <package id="protobuf-net" version="2.0.0.668" 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 7ccbf9c..4e75687 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=2.0.0.666, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
+    <Reference Include="protobuf-net, Version=2.0.0.668, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\..\packages\protobuf-net.2.0.0.666\lib\net35\protobuf-net.dll</HintPath>
+      <HintPath>..\..\packages\protobuf-net.2.0.0.668\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 721b810..7677730 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="2.0.0.666" targetFramework="net35" />
+  <package id="protobuf-net" version="2.0.0.668" 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 457b0cb..1df1aed 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=2.0.0.666, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
+    <Reference Include="protobuf-net, Version=2.0.0.668, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\..\packages\protobuf-net.2.0.0.666\lib\net40\protobuf-net.dll</HintPath>
+      <HintPath>..\..\packages\protobuf-net.2.0.0.668\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 3a95ccb..0cd8e89 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="2.0.0.666" targetFramework="net40" />
+  <package id="protobuf-net" version="2.0.0.668" 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 e89289a..305e3b6 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=2.0.0.666, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
+    <Reference Include="protobuf-net, Version=2.0.0.668, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\..\packages\protobuf-net.2.0.0.666\lib\net40\protobuf-net.dll</HintPath>
+      <HintPath>..\..\packages\protobuf-net.2.0.0.668\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 930682d..f4080de 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="2.0.0.666" targetFramework="net45" />
+  <package id="protobuf-net" version="2.0.0.668" targetFramework="net45" />
 </packages>
\ No newline at end of file