diff --git a/.gitignore b/.gitignore
index 9d4d6526..8c536566 100644
--- a/.gitignore
+++ b/.gitignore
@@ -240,4 +240,5 @@ ModelManifest.xml
 
 # FAKE - F# Make
 .fake/
-OptimizelySDK/nuget.exe
+OptimizelySDK.Package/nuget.exe
+OptimizelySDK.Package/lib
diff --git a/CHANGELOG.MD b/CHANGELOG.MD
index 934eb8a6..d89a90cd 100644
--- a/CHANGELOG.MD
+++ b/CHANGELOG.MD
@@ -1,3 +1,6 @@
+## 1.1.1
+ - Add .Net 4.0 build in nuget package.
+
 ## 1.1.0
  - Introduce the user profile service.
 
diff --git a/OptimizelySDK.Package/OptimizelySDK.nuspec b/OptimizelySDK.Package/OptimizelySDK.nuspec
index 69375397..f6b5235b 100644
--- a/OptimizelySDK.Package/OptimizelySDK.nuspec
+++ b/OptimizelySDK.Package/OptimizelySDK.nuspec
@@ -1,8 +1,8 @@
-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <package>
     <metadata>
         <id>Optimizely.SDK</id>
-        <version>0.1.0</version>
+        <version>1.1.1</version>
         <title>Optimizely C# SDK</title>
         <authors>Optimizely Development Team</authors>
         <owners>fullstack.optimizely</owners>
@@ -10,7 +10,7 @@
         <!-->projectUrl></projectUrl-->
         <requireLicenseAcceptance>false</requireLicenseAcceptance>
         <description>C# SDK for Optimizely X Fullstack</description>
-        <releaseNotes>This is a Beta Pre-Release.</releaseNotes>
+        <releaseNotes>General Availability</releaseNotes>
         <copyright>Copyright 2017</copyright>
         <tags>Optimizely</tags>
         <dependencies>
@@ -39,4 +39,4 @@
     <files>
         <file src="lib\**" target="lib" />
     </files>
-</package>
+</package>
\ No newline at end of file
diff --git a/OptimizelySDK.Tests/EventTests/EventBuilderTest.cs b/OptimizelySDK.Tests/EventTests/EventBuilderTest.cs
index a63a658e..dc2ffb66 100644
--- a/OptimizelySDK.Tests/EventTests/EventBuilderTest.cs
+++ b/OptimizelySDK.Tests/EventTests/EventBuilderTest.cs
@@ -41,7 +41,7 @@ public void TestCreateImpressionEventNoAttributes()
                     {"layerId", "7719770039" },
                     {"visitorId", "testUserId" },
                     {"clientEngine", "csharp-sdk" },
-                    {"clientVersion", "1.1.0" },
+                    {"clientVersion", "1.1.1" },
                     {"timestamp", SecondsSince1970() * 1000L },
                     {"isGlobalHoldback", false },
                     {"userFeatures", new string[0] },
@@ -75,7 +75,7 @@ public void TestCreateImpressionEventWithAttributes()
                     {"layerId", "7719770039" },
                     {"visitorId", "testUserId" },
                     {"clientEngine", "csharp-sdk" },
-                    {"clientVersion", "1.1.0" },
+                    {"clientVersion", "1.1.1" },
                     {"timestamp", SecondsSince1970() * 1000L},
                     {"isGlobalHoldback", false },
                     {"userFeatures",
@@ -126,7 +126,7 @@ public void TestCreateConversionEventNoAttributesNovalue()
                     {"accountId", "1592310167"},
                     {"visitorId", TestUserId},
                     {"clientEngine", "csharp-sdk"},
-                    {"clientVersion", "1.1.0"},
+                    {"clientVersion", "1.1.1"},
                     {"userFeatures", new string[0]},
                     {"isGlobalHoldback", false},
                     {"timestamp", SecondsSince1970() * 1000L} ,
@@ -172,7 +172,7 @@ public void TestCreateConversionEventWithAttributesNoValue()
                     {"accountId", "1592310167"},
                     {"visitorId", TestUserId},
                     {"clientEngine", "csharp-sdk"},
-                    {"clientVersion", "1.1.0"},
+                    {"clientVersion", "1.1.1"},
 
                     {"isGlobalHoldback", false},
                     {"timestamp", SecondsSince1970() * 1000L} ,
@@ -239,7 +239,7 @@ public void TestCreateConversionEventNoAttributesWithValue()
                     {"accountId", "1592310167"},
                     {"visitorId", TestUserId},
                     {"clientEngine", "csharp-sdk"},
-                    {"clientVersion", "1.1.0"},
+                    {"clientVersion", "1.1.1"},
 
                     {"isGlobalHoldback", false},
                     {"timestamp", SecondsSince1970() * 1000L} ,
@@ -311,7 +311,7 @@ public void TestCreateConversionEventWithAttributesWithValue()
                     {"accountId", "1592310167"},
                     {"visitorId", TestUserId},
                     {"clientEngine", "csharp-sdk"},
-                    {"clientVersion", "1.1.0"},
+                    {"clientVersion", "1.1.1"},
                     {"isGlobalHoldback", false},
                     {"timestamp", SecondsSince1970() * 1000L} ,
                     {"eventFeatures",
@@ -410,7 +410,7 @@ public void TestCreateConversionEventNoAttributesWithInvalidValue()
                 {"visitorId", "testUserId"},
                 // {"revision", "15"}, TODO: It should be a part of project config file, have to check it.
                 {"clientEngine", "csharp-sdk"},
-                {"clientVersion", "1.1.0"},
+                {"clientVersion", "1.1.1"},
                 {"userFeatures" , new object[0]},
                 {"isGlobalHoldback", false},
                 {"timestamp", SecondsSince1970() * 1000L },
diff --git a/OptimizelySDK.sln b/OptimizelySDK.sln
index b5e29812..eea62b72 100644
--- a/OptimizelySDK.sln
+++ b/OptimizelySDK.sln
@@ -16,7 +16,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 	ProjectSection(SolutionItems) = preProject
 		CHANGELOG.MD = CHANGELOG.MD
 		CONTRIBUTING.md = CONTRIBUTING.md
-		OptimizelySDK\OptimizelySDK.nuspec = OptimizelySDK\OptimizelySDK.nuspec
+		OptimizelySDK.Package\OptimizelySDK.nuspec = OptimizelySDK.Package\OptimizelySDK.nuspec
+		OptimizelySDK.Package\pack.ps1 = OptimizelySDK.Package\pack.ps1
 		README.md = README.md
 	EndProjectSection
 EndProject
diff --git a/OptimizelySDK/Event/Builder/EventBuilder.cs b/OptimizelySDK/Event/Builder/EventBuilder.cs
index af6f6a68..6c567503 100644
--- a/OptimizelySDK/Event/Builder/EventBuilder.cs
+++ b/OptimizelySDK/Event/Builder/EventBuilder.cs
@@ -26,7 +26,7 @@ public class EventBuilder
     {
         private const string SDK_TYPE = "csharp-sdk";
 
-        private const string SDK_VERSION = "1.1.0";
+        private const string SDK_VERSION = "1.1.1";
 
         private const string IMPRESSION_ENDPOINT = "https://logx.optimizely.com/log/decision";
 
diff --git a/OptimizelySDK/OptimizelySDK.nuspec b/OptimizelySDK/OptimizelySDK.nuspec
deleted file mode 100644
index 018a90f4..00000000
--- a/OptimizelySDK/OptimizelySDK.nuspec
+++ /dev/null
@@ -1,17 +0,0 @@
-<?xml version="1.0"?>
-<package >
-  <metadata>
-    <id>Optimizely.SDK</id>
-    <version>1.1.0</version>
-    <title>Optimizely C# SDK</title>
-    <authors>Optimizely Development Team</authors>
-    <owners>fullstack.optimizely</owners>
-    <licenseUrl>http://www.apache.org/licenses/LICENSE-2.0</licenseUrl>
-    <!-->projectUrl></projectUrl-->
-    <requireLicenseAcceptance>false</requireLicenseAcceptance>
-    <description>C# SDK for Optimizely X Fullstack</description>
-    <releaseNotes>General Availability</releaseNotes>
-    <copyright>Copyright 2017</copyright>
-    <tags>Optimizely</tags>
-  </metadata>
-</package>