diff --git a/ports/azure-iot-sdk-c/CONTROL b/ports/azure-iot-sdk-c/CONTROL
index 047f55c6a8..f545665b0b 100644
--- a/ports/azure-iot-sdk-c/CONTROL
+++ b/ports/azure-iot-sdk-c/CONTROL
@@ -1,5 +1,5 @@
 Source: azure-iot-sdk-c
-Version: 2019-10-11.2
+Version: 2019-11-21.1
 Build-Depends: azure-uamqp-c, azure-umqtt-c, azure-c-shared-utility, parson, azure-uhttp-c, azure-macro-utils-c, umock-c
 Description: A C99 SDK for connecting devices to Microsoft Azure IoT services 
 
diff --git a/ports/azure-iot-sdk-c/cmake-hsm-option.patch b/ports/azure-iot-sdk-c/cmake-hsm-option.patch
deleted file mode 100644
index ea6af5c239..0000000000
--- a/ports/azure-iot-sdk-c/cmake-hsm-option.patch
+++ /dev/null
@@ -1,20 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index b2c51de83..5d42dc441 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -121,9 +121,12 @@ if (${use_prov_client})
-     set(use_prov_client_core ON)
- 
-     if ("${hsm_custom_lib}" STREQUAL "")
--        set(hsm_type_x509 ON)
--        set(hsm_type_sastoken ON)
--        set(hsm_type_symm_key ON)
-+        if ((NOT ${hsm_type_x509}) AND (NOT ${hsm_type_sastoken}) AND (NOT ${hsm_type_symm_key}))
-+            # If the cmake option did not explicitly configure an hsm type, then enable them all.
-+            set(hsm_type_x509 ON)
-+            set(hsm_type_sastoken ON)
-+            set(hsm_type_symm_key ON)
-+        endif()
-     else()
-         set(hsm_type_custom ON)
-     endif()
diff --git a/ports/azure-iot-sdk-c/portfile.cmake b/ports/azure-iot-sdk-c/portfile.cmake
index 98d051e2b4..83f6371149 100644
--- a/ports/azure-iot-sdk-c/portfile.cmake
+++ b/ports/azure-iot-sdk-c/portfile.cmake
@@ -6,10 +6,10 @@ if("public-preview" IN_LIST FEATURES)
     vcpkg_from_github(
         OUT_SOURCE_PATH SOURCE_PATH
         REPO Azure/azure-iot-sdk-c
-        REF d1cdf78b5160af8e08354e102a6b96395eee79e1
-        SHA512 0efbfc19e5eef4831b55ded0e8d88e83194bc0f26886841ddc83405c15b7f1bae983e22dc569e22846acd78b843b9e7492883b7c502f4eed92ff80ef45a9942d
+        REF cb2e8d390df56ffa31d08ca0a79ab58ff96160cc
+        SHA512 6798b17d6768b3ccbd0eb66719b50f364cd951736eb71110e2dc9deca054a1566ff88b9e8c5e9b52536e4308cad6cd3cbebff3282c123083e3afaee5535e724b
         HEAD_REF public-preview
-        PATCHES improve-external-deps.patch cmake-hsm-option.patch
+        PATCHES improve-external-deps.patch
     )
 else()
     vcpkg_from_github(