diff --git a/driver/Aeron.Driver.nuspec b/driver/Aeron.Driver.nuspec
index 3464ebfc..e0e52630 100644
--- a/driver/Aeron.Driver.nuspec
+++ b/driver/Aeron.Driver.nuspec
@@ -2,7 +2,7 @@
 <package >
   <metadata>
     <id>Aeron.Driver</id>
-    <version>1.3.1.0</version>
+    <version>1.4.0.0</version>
     <title>Aeron Driver</title>
     <authors>Adaptive Financial Consulting Ltd.</authors>
     <owners>Adaptive Financial Consulting Ltd.</owners>
@@ -11,7 +11,7 @@
     <iconUrl>https://raw.githubusercontent.com/AdaptiveConsulting/Aeron.NET/master/images/adaptive.png</iconUrl>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <description>Aeron Media Driver for use with Aeron.Client.</description>
-    <releaseNotes>Make less CPU intensive by default.</releaseNotes>
+    <releaseNotes>update aeron driver to 1.4.0.</releaseNotes>
     <copyright>Copyright 2017</copyright>
     <tags>aeron driver messaging networking transport udp ipc</tags>
   </metadata>
diff --git a/src/Adaptive.Aeron/Adaptive.Aeron.nuspec b/src/Adaptive.Aeron/Adaptive.Aeron.nuspec
index 39d294ba..d05ebe07 100644
--- a/src/Adaptive.Aeron/Adaptive.Aeron.nuspec
+++ b/src/Adaptive.Aeron/Adaptive.Aeron.nuspec
@@ -2,7 +2,7 @@
 <package >
   <metadata>
     <id>Aeron.Client</id>
-    <version>1.3.1.0</version>
+    <version>1.4.0.0</version>
     <title>Aeron Client</title>
     <authors>Adaptive Financial Consulting Ltd.</authors>
     <owners>Adaptive Financial Consulting Ltd.</owners>
@@ -11,7 +11,7 @@
     <iconUrl>https://raw.githubusercontent.com/AdaptiveConsulting/Aeron.NET/master/images/adaptive.png</iconUrl>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <description>Efficient reliable UDP unicast, UDP multicast, and IPC transport protocol.</description>
-    <releaseNotes>Fix bug with driver communication. Add NoopLock &amp; CompositeAgent</releaseNotes>
+    <releaseNotes>https://github.com/real-logic/aeron/wiki/Change-Log</releaseNotes>
     <copyright>Copyright 2017</copyright>
     <tags>aeron client messaging networking transport udp ipc</tags>
   </metadata>
diff --git a/src/Adaptive.Aeron/Properties/AssemblyInfo.cs b/src/Adaptive.Aeron/Properties/AssemblyInfo.cs
index 1bd8ddcd..8fa111d7 100644
--- a/src/Adaptive.Aeron/Properties/AssemblyInfo.cs
+++ b/src/Adaptive.Aeron/Properties/AssemblyInfo.cs
@@ -48,8 +48,8 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.3.1.0")]
-[assembly: AssemblyFileVersion("1.3.1.0")]
+[assembly: AssemblyVersion("1.4.0.0")]
+[assembly: AssemblyFileVersion("1.4.0.0")]
 
 [assembly: InternalsVisibleTo("Adaptive.Aeron.Tests")]
 [assembly: InternalsVisibleTo("DynamicProxyGenAssembly2")]
diff --git a/src/Adaptive.Agrona/Properties/AssemblyInfo.cs b/src/Adaptive.Agrona/Properties/AssemblyInfo.cs
index b8f0167b..126764be 100644
--- a/src/Adaptive.Agrona/Properties/AssemblyInfo.cs
+++ b/src/Adaptive.Agrona/Properties/AssemblyInfo.cs
@@ -48,5 +48,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.3.1.0")]
-[assembly: AssemblyFileVersion("1.3.1.0")]
+[assembly: AssemblyVersion("1.4.0.0")]
+[assembly: AssemblyFileVersion("1.4.0.0")]