diff --git a/Common/version.props b/Common/version.props
index e4da65ad3..d1405902f 100644
--- a/Common/version.props
+++ b/Common/version.props
@@ -1,7 +1,7 @@
 <!-- This file may be overwritten by automation. Only values allowed here are VersionPrefix and VersionSuffix.  -->
 <Project>
   <PropertyGroup>
-    <VersionPrefix>1.6.5</VersionPrefix>
+    <VersionPrefix>1.6.6</VersionPrefix>
     <VersionSuffix></VersionSuffix>
   </PropertyGroup>
 </Project>
diff --git a/Samples/Framework/build.props b/Samples/Framework/build.props
index 8196652fb..55bc4717e 100644
--- a/Samples/Framework/build.props
+++ b/Samples/Framework/build.props
@@ -12,6 +12,6 @@
     <OutputPath>..\bin\</OutputPath>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.PSharp" Version="1.6.5" />
+    <PackageReference Include="Microsoft.PSharp" Version="1.6.6" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/Samples/Language/build.props b/Samples/Language/build.props
index 335389f3a..27e20a0ed 100644
--- a/Samples/Language/build.props
+++ b/Samples/Language/build.props
@@ -10,6 +10,6 @@
     <OutputPath>..\bin\</OutputPath>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.PSharp" Version="1.6.5" />
+    <PackageReference Include="Microsoft.PSharp" Version="1.6.6" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/Scripts/NuGet/PSharp.nuspec b/Scripts/NuGet/PSharp.nuspec
index 328bb6ee1..54fd545cf 100644
--- a/Scripts/NuGet/PSharp.nuspec
+++ b/Scripts/NuGet/PSharp.nuspec
@@ -2,13 +2,13 @@
 <package >
   <metadata>
     <id>Microsoft.PSharp</id>
-    <version>1.6.5</version>
+    <version>1.6.6</version>
     <authors>Microsoft</authors>
     <projectUrl>https://github.com/p-org/PSharp</projectUrl>
     <license type="expression">MIT</license>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <description>P# is a framework for rapid development of reliable asynchronous software.</description>
-    <releaseNotes>This release contains the 1.6.5 version of the P# framework.</releaseNotes>
+    <releaseNotes>This release contains the 1.6.6 version of the P# framework.</releaseNotes>
     <copyright>© Microsoft Corporation. All rights reserved.</copyright>
     <tags>asynchrony reliability specifications reactive state-machines testing</tags>
   </metadata>
diff --git a/Tools/Visualization/TraceViewer/Properties/AssemblyInfo.cs b/Tools/Visualization/TraceViewer/Properties/AssemblyInfo.cs
index d40987298..16e5fa862 100644
--- a/Tools/Visualization/TraceViewer/Properties/AssemblyInfo.cs
+++ b/Tools/Visualization/TraceViewer/Properties/AssemblyInfo.cs
@@ -52,5 +52,5 @@
 // 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("1.6.5.0")]
-[assembly: AssemblyFileVersion("1.6.5.0")]
+[assembly: AssemblyVersion("1.6.6.0")]
+[assembly: AssemblyFileVersion("1.6.6.0")]