diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7812640..42137bd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,25 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+## [3.3.1] - 2020-11-02
+- Fix async methods when passing a `TransactionId` or `CustomerId` property
+
+## [3.3.0] - 2020-03-31
+- Include custom user agent for debugging and informational purposes
+
+## [3.2.1] - 2020-03-09
+- Fix .NET standard binary version
+
+## [3.2.0] - 2020-03-04
+- Update RestSharp to version 106.10.1
+- Improve performance of async methods with `ConfigureAwait(false)`
+
+## [3.1.2] - 2020-01-15
+- Update Newtonsoft.Json to version 12.0.3
+
+## [3.1.1] - 2019-12-16
+- Ignore null values passed to optional `ExemptionType` and `Provider` params for non-anonymous objects
+
 ## [3.1.0] - 2019-07-09
 - Add `provider` param to transaction methods
 - Support order-level exemptions via `exemption_type` param
@@ -78,7 +97,13 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ## [1.0.0] - 2016-09-20
 - Initial release
 
-[Unreleased]: https://github.com/taxjar/taxjar.net/compare/v3.1.0...HEAD
+[Unreleased]: https://github.com/taxjar/taxjar.net/compare/v3.3.1...HEAD
+[3.3.1]: https://github.com/taxjar/taxjar.net/compare/v3.3.0...v3.3.1
+[3.3.0]: https://github.com/taxjar/taxjar.net/compare/v3.2.1...v3.3.0
+[3.2.1]: https://github.com/taxjar/taxjar.net/compare/v3.2.0...v3.2.1
+[3.2.0]: https://github.com/taxjar/taxjar.net/compare/v3.1.2...v3.2.0
+[3.1.2]: https://github.com/taxjar/taxjar.net/compare/v3.1.1...v3.1.2
+[3.1.1]: https://github.com/taxjar/taxjar.net/compare/v3.1.0...v3.1.1
 [3.1.0]: https://github.com/taxjar/taxjar.net/compare/v3.0.2...v3.1.0
 [3.0.2]: https://github.com/taxjar/taxjar.net/compare/v3.0.1...v3.0.2
 [3.0.1]: https://github.com/taxjar/taxjar.net/compare/v3.0.0...v3.0.1
diff --git a/build/TaxJar.nuspec b/build/TaxJar.nuspec
index 8c62fff..8b88ef1 100644
--- a/build/TaxJar.nuspec
+++ b/build/TaxJar.nuspec
@@ -3,7 +3,7 @@
   <metadata xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
     <id>TaxJar</id>
     <title>TaxJar</title>
-    <version>3.3.0</version>
+    <version>3.3.1</version>
     <authors>Jake Johnson</authors>
     <owners>TaxJar</owners>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
@@ -12,7 +12,7 @@
     <iconUrl>https://github.com/taxjar/taxjar.net/raw/master/build/taxjar-icon.png</iconUrl>
     <description>TaxJar makes sales tax filing easier for online sellers and merchants. See local jurisdictional tax reports, get payment reminders, and more. You can use our API to access TaxJar API endpoints, which can get information on sales tax rates, categories or upload transactions.</description>
     <releaseNotes>
-- Include custom user agent for debugging and informational purposes
+- Fix async methods when passing a `TransactionId` or `CustomerId` property
     </releaseNotes>
     <language>en-US</language>
     <tags>sales tax taxes ecommerce</tags>
diff --git a/src/Taxjar.Tests/TaxJar.Tests.csproj b/src/Taxjar.Tests/TaxJar.Tests.csproj
index 986f7a9..4867193 100644
--- a/src/Taxjar.Tests/TaxJar.Tests.csproj
+++ b/src/Taxjar.Tests/TaxJar.Tests.csproj
@@ -6,7 +6,7 @@
     <AssemblyName>TaxJar.Tests</AssemblyName>
     <IsPackable>false</IsPackable>
     <SignAssembly>true</SignAssembly>
-    <ReleaseVersion>3.3.0</ReleaseVersion>
+    <ReleaseVersion>3.3.1</ReleaseVersion>
     <OutputType>Library</OutputType>
   </PropertyGroup>
 
diff --git a/src/Taxjar.sln b/src/Taxjar.sln
index b38e14e..62ce9dd 100644
--- a/src/Taxjar.sln
+++ b/src/Taxjar.sln
@@ -47,6 +47,6 @@ Global
 		$6.String = T
 		$5.RequiredSuffixes = $7
 		$7.String = Exception
-		version = 3.3.0
+		version = 3.3.1
 	EndGlobalSection
 EndGlobal
diff --git a/src/Taxjar/Taxjar.csproj b/src/Taxjar/Taxjar.csproj
index 11b6df2..51576b5 100644
--- a/src/Taxjar/Taxjar.csproj
+++ b/src/Taxjar/Taxjar.csproj
@@ -4,7 +4,7 @@
     <TargetFrameworks>netstandard2.0;net452</TargetFrameworks>
     <Description>TaxJar makes sales tax filing easier for online sellers and merchants. See local jurisdictional tax reports, get payment reminders, and more. You can use our API to access TaxJar API endpoints, which can get information on sales tax rates, categories or upload transactions.</Description>
     <AssemblyTitle>TaxJar</AssemblyTitle>
-    <Version>3.3.0</Version>
+    <Version>3.3.1</Version>
     <Authors>Jake Johnson</Authors>
     <AssemblyName>TaxJar</AssemblyName>
     <PackageId>TaxJar</PackageId>
@@ -12,7 +12,7 @@
     <RootNamespace>Taxjar</RootNamespace>
     <PackageProjectUrl>https://github.com/taxjar/taxjar.net</PackageProjectUrl>
     <PackageLicenseUrl>https://github.com/taxjar/taxjar.net/blob/master/LICENSE.txt</PackageLicenseUrl>
-    <ReleaseVersion>3.3.0</ReleaseVersion>
+    <ReleaseVersion>3.3.1</ReleaseVersion>
     <DefineConstants Condition=" '$(TargetFramework)' == 'net452' ">NET452</DefineConstants>
   </PropertyGroup>