diff --git a/iothub/service/src/Microsoft.Azure.Devices.csproj b/iothub/service/src/Microsoft.Azure.Devices.csproj
index fc50fdb385..9cc4c360c6 100644
--- a/iothub/service/src/Microsoft.Azure.Devices.csproj
+++ b/iothub/service/src/Microsoft.Azure.Devices.csproj
@@ -174,6 +174,6 @@
     <PackageReference Include="System.Diagnostics.TraceSource" Version="4.3.0" />
     <PackageReference Include="System.Diagnostics.Contracts" Version="4.3.0" />
     <PackageReference Include="Microsoft.Rest.ClientRuntime" Version="2.3.21" />
-    <PackageReference Include="Azure.Core" Version="1.9.0" />
+    <PackageReference Include="Azure.Core" Version="1.22.0" />
   </ItemGroup>
 </Project>
diff --git a/readme.md b/readme.md
index 3baa41f73f..7526650335 100644
--- a/readme.md
+++ b/readme.md
@@ -205,12 +205,13 @@ This table shows previous LTS releases and end dates.
 
 | Release                                                                                                                        | LTS Start Date | Maintenance End Date | LTS End Date |
 | :----------------------------------------------------------------------------------------------------------------------------: | :------------: | :------------------: | :----------: |
+| [2022-01-18](https://github.com/Azure/azure-iot-sdk-csharp/releases/tag/lts_2021-3-18-patch4) <sub>patch 4 of 2021-03-18</sub> | 2022-01-18     | 2022-03-18           | 2024-03-17   |
 | [2021-10-19](https://github.com/Azure/azure-iot-sdk-csharp/releases/tag/lts_2021-3-18-patch3) <sub>patch 3 of 2021-03-18</sub> | 2021-10-19     | 2022-03-18           | 2024-03-17   |
 | [2021-8-12](https://github.com/Azure/azure-iot-sdk-csharp/releases/tag/lts_2021-3-18_patch2) <sub>patch 2 of 2021-03-18</sub>  | 2021-08-12     | 2022-03-18           | 2024-03-17   |
-| [2021-8-10](https://github.com/Azure/azure-iot-sdk-csharp/releases/tag/lts_2020-8-19_patch2) <sub>patch 2 of 2021-08-19</sub>  | 2021-08-10     | 2021-08-19           | 2023-08-19   |
+| [2021-8-10](https://github.com/Azure/azure-iot-sdk-csharp/releases/tag/lts_2020-8-19_patch2) <sub>patch 2 of 2020-08-19</sub>  | 2020-08-10     | 2021-08-19           | 2023-08-19   |
 | [2021-6-23](https://github.com/Azure/azure-iot-sdk-csharp/releases/tag/lts_2021-3-18_patch1) <sub>patch 1 of 2021-03-18        | 2020-06-23     | 2022-03-18           | 2024-03-17   |
 | [2021-3-18](https://github.com/Azure/azure-iot-sdk-csharp/releases/tag/lts_2021-3-18)                                          | 2020-03-18     | 2022-03-18           | 2024-03-17   |
-| [2020-9-23](https://github.com/Azure/azure-iot-sdk-csharp/releases/tag/lts_2020-8-19_patch1) <sub>patch 1 of 2021-08-19</sub>  | 2020-09-23     | 2021-08-19           | 2023-08-19   |
+| [2020-9-23](https://github.com/Azure/azure-iot-sdk-csharp/releases/tag/lts_2020-8-19_patch1) <sub>patch 1 of 2020-08-19</sub>  | 2020-09-23     | 2021-08-19           | 2023-08-19   |
 | [2020-8-19](https://github.com/Azure/azure-iot-sdk-csharp/releases/tag/lts_2020-8-19)                                          | 2020-08-19     | 2021-08-19           | 2023-08-19   |
 | [2020-4-3](https://github.com/Azure/azure-iot-sdk-csharp/releases/tag/lts_2020-1-31_patch1) <sub>patch 1 of 2020-01-31</sub>   | 2020-04-03     | 2021-01-30           | 2023-01-30   |
 | [2020-1-31](https://github.com/Azure/azure-iot-sdk-csharp/releases/tag/lts_2020-1-31)                                          | 2020-01-31     | 2021-01-30           | 2023-01-30   |