diff --git a/src/NetMQ.Tests/NetMQ.Tests.csproj b/src/NetMQ.Tests/NetMQ.Tests.csproj
index 48b3108..e2b817a 100644
--- a/src/NetMQ.Tests/NetMQ.Tests.csproj
+++ b/src/NetMQ.Tests/NetMQ.Tests.csproj
@@ -37,9 +37,9 @@
     <StartupObject>NetMQ.Tests.NetMQTestRunner</StartupObject>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="AsyncIO, Version=0.1.18.0, Culture=neutral, PublicKeyToken=44a94435bd6f33f8, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\AsyncIO.0.1.18.0\lib\net40\AsyncIO.dll</HintPath>
+    <Reference Include="AsyncIO, Version=0.1.20.0, Culture=neutral, PublicKeyToken=44a94435bd6f33f8, processorArchitecture=MSIL">
+      <HintPath>..\packages\AsyncIO.0.1.20.0\lib\net40\AsyncIO.dll</HintPath>
+      <Private>True</Private>
     </Reference>
     <Reference Include="JetBrains.Annotations">
       <HintPath>..\packages\JetBrains.Annotations.10.0.0\lib\net20\JetBrains.Annotations.dll</HintPath>
diff --git a/src/NetMQ.Tests/NetMQ3.5.Tests.csproj b/src/NetMQ.Tests/NetMQ3.5.Tests.csproj
index a0d337d..84d12db 100644
--- a/src/NetMQ.Tests/NetMQ3.5.Tests.csproj
+++ b/src/NetMQ.Tests/NetMQ3.5.Tests.csproj
@@ -38,9 +38,9 @@
     <StartupObject>NetMQ.Tests.NetMQTestRunner</StartupObject>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="AsyncIO, Version=0.1.18.0, Culture=neutral, PublicKeyToken=44a94435bd6f33f8, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\AsyncIO.0.1.18.0\lib\net40\AsyncIO.dll</HintPath>
+    <Reference Include="AsyncIO, Version=0.1.20.0, Culture=neutral, PublicKeyToken=44a94435bd6f33f8, processorArchitecture=MSIL">
+      <HintPath>..\packages\AsyncIO.0.1.20.0\lib\net40\AsyncIO.dll</HintPath>
+      <Private>True</Private>
     </Reference>
     <Reference Include="JetBrains.Annotations">
       <HintPath>..\packages\JetBrains.Annotations.10.0.0\lib\net20\JetBrains.Annotations.dll</HintPath>
diff --git a/src/NetMQ.Tests/packages.NetMQ.Tests.config b/src/NetMQ.Tests/packages.NetMQ.Tests.config
index ceeff1c..bae82e9 100644
--- a/src/NetMQ.Tests/packages.NetMQ.Tests.config
+++ b/src/NetMQ.Tests/packages.NetMQ.Tests.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="AsyncIO" version="0.1.18.0" targetFramework="net40" />
+  <package id="AsyncIO" version="0.1.20.0" targetFramework="net40" />
   <package id="JetBrains.Annotations" version="10.0.0" targetFramework="net40" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net40" />
 </packages>
\ No newline at end of file
diff --git a/src/NetMQ.Tests/packages.NetMQ3.5.Tests.config b/src/NetMQ.Tests/packages.NetMQ3.5.Tests.config
index ceeff1c..bae82e9 100644
--- a/src/NetMQ.Tests/packages.NetMQ3.5.Tests.config
+++ b/src/NetMQ.Tests/packages.NetMQ3.5.Tests.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="AsyncIO" version="0.1.18.0" targetFramework="net40" />
+  <package id="AsyncIO" version="0.1.20.0" targetFramework="net40" />
   <package id="JetBrains.Annotations" version="10.0.0" targetFramework="net40" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net40" />
 </packages>
\ No newline at end of file
diff --git a/src/NetMQ/NetMQ.csproj b/src/NetMQ/NetMQ.csproj
index 49912cc..d3c6e3b 100644
--- a/src/NetMQ/NetMQ.csproj
+++ b/src/NetMQ/NetMQ.csproj
@@ -37,8 +37,9 @@
     <AssemblyOriginatorKeyFile>NetMQ.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="AsyncIO">
-      <HintPath>..\packages\AsyncIO.0.1.18.0\lib\net40\AsyncIO.dll</HintPath>
+    <Reference Include="AsyncIO, Version=0.1.20.0, Culture=neutral, PublicKeyToken=44a94435bd6f33f8, processorArchitecture=MSIL">
+      <HintPath>..\packages\AsyncIO.0.1.20.0\lib\net40\AsyncIO.dll</HintPath>
+      <Private>True</Private>
     </Reference>
     <Reference Include="JetBrains.Annotations">
       <HintPath>..\packages\JetBrains.Annotations.10.0.0\lib\net20\JetBrains.Annotations.dll</HintPath>
diff --git a/src/NetMQ/NetMQ3.5.csproj b/src/NetMQ/NetMQ3.5.csproj
index c233f4d..95a81fe 100644
--- a/src/NetMQ/NetMQ3.5.csproj
+++ b/src/NetMQ/NetMQ3.5.csproj
@@ -42,8 +42,8 @@
     <AssemblyOriginatorKeyFile>NetMQ.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="AsyncIO">
-      <HintPath>..\packages\AsyncIO.0.1.18.0\lib\net35\AsyncIO.dll</HintPath>
+    <Reference Include="AsyncIO, Version=0.1.20.0, Culture=neutral, PublicKeyToken=44a94435bd6f33f8, processorArchitecture=MSIL">
+      <HintPath>..\packages\AsyncIO.0.1.20.0\lib\net35\AsyncIO.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="JetBrains.Annotations">
diff --git a/src/NetMQ/packages.NetMQ.config b/src/NetMQ/packages.NetMQ.config
index 5098f96..1ddb760 100644
--- a/src/NetMQ/packages.NetMQ.config
+++ b/src/NetMQ/packages.NetMQ.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="AsyncIO" version="0.1.18.0" targetFramework="net40" />
+  <package id="AsyncIO" version="0.1.20.0" targetFramework="net40" />
   <package id="JetBrains.Annotations" version="10.0.0" targetFramework="net40" />
 </packages>
\ No newline at end of file
diff --git a/src/NetMQ/packages.NetMQ3.5.config b/src/NetMQ/packages.NetMQ3.5.config
index c96619e..09fbc0e 100644
--- a/src/NetMQ/packages.NetMQ3.5.config
+++ b/src/NetMQ/packages.NetMQ3.5.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="AsyncIO" version="0.1.18.0" targetFramework="net35" />
+  <package id="AsyncIO" version="0.1.20.0" targetFramework="net35" />
   <package id="JetBrains.Annotations" version="10.0.0" targetFramework="net35" />
 </packages>
\ No newline at end of file