diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0105722..3b142ae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog for Edge
 
+## Release 0.19.1
+
+* Implemented combined update callbacks for bootloader. This assumes that boot capsule update is implemented on the device.
+
+## Release 0.19.0
+
+* Updated to [Pelion Device Management Client (PDMC) library version 4.11.1](https://github.com/PelionIoT/mbed-cloud-client/blob/master/CHANGELOG.md#release-4111-11102021)
+* Updated to [Mbed TLS version 2.27](https://github.com/ARMmbed/mbedtls/releases/tag/v2.27.0)
+* Updated parsec-se-driver version from 0.5.0 to 0.6.0 (in `lib/pal-platform.json`).
+* Ported subdevice FOTA support to be compatible with new FOTA framework library. This feature is no longer supported with UC Hub library. 
+* Implemented callbacks to support combined update feature of Device Management Update Client introduced in PDMC 4.11.0.
+* Install edge_tool.py and cbor_converter.py scripts with `edge-tool/setup.py`.
+* Setting the default value of `MBED_CONF_MBED_CLIENT_MAX_RECONNECT_TIMEOUT` to 10 mins.
+
 ## Release 0.18.0
 
 * Updated to [Pelion Device Management Client (PDMC) library version 4.9.0](https://github.com/PelionIoT/mbed-cloud-client/blob/master/CHANGELOG.md#release-490-20052021).
diff --git a/README.md b/README.md
index d52e735..f74d590 100644
--- a/README.md
+++ b/README.md
@@ -179,6 +179,12 @@ machine used to run Edge.
 For standard desktop Linux the value is set in `cmake/edge_configure.cmake` to
 a value `ARM_UCP_LINUX_GENERIC`.
 
+#### Combined image update
+
+Lets you group together multiple images on the device as requiring a simultaneous update. This is useful when the images have a strong dependency on each other during device boot in runtime. For instance, use this feature to update the boot and rootfs image of the gateway in a single update process. To enable it, add the flag `-DFOTA_COMBINED_IMAGE_SUPPORT=ON` during build time. 
+
+`fota/fota_app_callbacks.c` implements the callbacks to support the combined image update feature. For detailed information, follow [this link](https://developer.pelion.com/docs/device-management/current/connecting/implementing-combined-update.html).
+
 
 ### Enabling Parsec
 
diff --git a/cmake/edge_configure.cmake b/cmake/edge_configure.cmake
index 9c9e572..d9940f2 100644
--- a/cmake/edge_configure.cmake
+++ b/cmake/edge_configure.cmake
@@ -118,6 +118,12 @@ if (${FIRMWARE_UPDATE})
     if (NOT DEFINED FOTA_INSTALL_MAIN_SCRIPT)
       SET (FOTA_INSTALL_MAIN_SCRIPT \"fota_update_activate.sh\")
     endif()
+    if (NOT DEFINED BOOT_CAPSULE_UPDATE_DIR)
+      SET (BOOT_CAPSULE_UPDATE_DIR \"/boot/efi/EFI/UpdateCapsule\")
+    endif()
+    if (NOT DEFINED BOOT_CAPSULE_UPDATE_FILENAME)
+      SET (BOOT_CAPSULE_UPDATE_FILENAME \"u-boot-caps.bin\")
+    endif()
 
     add_definitions(-DFOTA_DEFAULT_APP_IFS=1)
     add_definitions(-DTARGET_LIKE_LINUX=1)
@@ -127,6 +133,8 @@ if (${FIRMWARE_UPDATE})
       add_definitions(-DMBED_CLOUD_CLIENT_FOTA_SUB_COMPONENT_SUPPORT=1)
       add_definitions(-DFOTA_CUSTOM_PLATFORM=1)
       add_definitions(-DFOTA_COMBINED_IMAGE_VENDOR_MAX_DATA_SIZE=64)
+      add_definitions(-DBOOT_CAPSULE_UPDATE_DIR=${BOOT_CAPSULE_UPDATE_DIR})
+      add_definitions(-DBOOT_CAPSULE_UPDATE_FILENAME=${BOOT_CAPSULE_UPDATE_FILENAME})
     endif()
   endif()
 
@@ -167,6 +175,7 @@ if (${FIRMWARE_UPDATE})
      MESSAGE("Update client hub selected.")
      add_definitions ("-DMBED_CLOUD_CLIENT_SUPPORT_UPDATE=1")
      add_definitions("-DPAL_DNS_API_VERSION=1")
+     message("WARNING: The next release, 0.20, will deprecate the Update Client (UC) hub library. Please use the new FOTA framework library, which can be enabled by adding -DFOTA_ENABLE=ON flag.")
      set(ENABLE_UC_HUB ON)
   endif()
 
diff --git a/fota/fota_app_callbacks.c b/fota/fota_app_callbacks.c
index 34264eb..942e22d 100644
--- a/fota/fota_app_callbacks.c
+++ b/fota/fota_app_callbacks.c
@@ -29,6 +29,7 @@
 #include <assert.h>
 
 #define ACTIVATE_SCRIPT_LENGTH 512
+#define CURR_SHA_FILE_NAME MBED_CLOUD_CLIENT_FOTA_LINUX_CONFIG_DIR "/fota_curr_sha"
 
 int deploy_ostree_delta_update(const char *candidate_fs_name)
 {
@@ -64,11 +65,9 @@ int verify_ostree_delta_update(const char *commit)
 
     int length = snprintf(command,
                           ACTIVATE_SCRIPT_LENGTH,
-                          "ostree log %s", commit);
+                          "ostree admin status | head -1 | grep %s", commit);
     FOTA_ASSERT(length < ACTIVATE_SCRIPT_LENGTH);
 
-    FOTA_TRACE_DEBUG("system cmd %s, rc %d", command, rc);
-
     /* execute script command */
     rc = system(command);
     if (rc) {
@@ -94,6 +93,11 @@ int fota_app_on_install_candidate(const char *candidate_fs_name, const manifest_
 
 int main_sub_component_install_handler(const char *comp_name, const char *sub_comp_name, const char *file_name, const uint8_t *vendor_data, size_t vendor_data_size)
 {
+    int rc = system("ostree admin status | head -1 | sed 's/\\\..*//' | sed 's/.* //g' > " CURR_SHA_FILE_NAME);
+    if (rc) {
+        FOTA_TRACE_ERROR("Unable to save current ostree sha");
+        return FOTA_STATUS_FW_INSTALLATION_FAILED;
+    }
     return deploy_ostree_delta_update(file_name);
 }
 
@@ -104,37 +108,64 @@ int main_sub_component_verify_handler(const char *comp_name, const char *sub_com
 
 int main_sub_component_rollback_handler(const char *comp_name, const char *sub_comp_name, const uint8_t *vendor_data, size_t vendor_data_size)
 {
-    FOTA_TRACE_DEBUG("main_sub_component_rollback_handler comp %s, subcomp %s", comp_name, sub_comp_name);
+    int rc = system("ostree admin deploy `cat " CURR_SHA_FILE_NAME "`");
+    if (rc) {
+        FOTA_TRACE_ERROR("Unable to rollback main sub component, result %d", WEXITSTATUS(rc));
+        return FOTA_STATUS_FW_INSTALLATION_FAILED;
+    }
     return FOTA_STATUS_SUCCESS;
 }
 
 int main_sub_component_finalize_handler(const char *comp_name, const char *sub_comp_name, const uint8_t *vendor_data, size_t vendor_data_size, fota_status_e fota_status)
 {
-    FOTA_TRACE_DEBUG("main_sub_component_finalize_handler comp %s, subcomp %s", comp_name, sub_comp_name);
+    remove(CURR_SHA_FILE_NAME);
     return FOTA_STATUS_SUCCESS;
 }
 
 int boot_sub_component_install_handler(const char *comp_name, const char *sub_comp_name, const char *file_name, const uint8_t *vendor_data, size_t vendor_data_size)
 {
-    FOTA_TRACE_DEBUG("boot_sub_component_install_handler comp %s, subcomp %s", comp_name, sub_comp_name);
+    int rc;
+    char command[ACTIVATE_SCRIPT_LENGTH] = {0};
+    rc = system("mkdir -p " BOOT_CAPSULE_UPDATE_DIR);
+    if (rc) {
+        FOTA_TRACE_ERROR("Unable to create capsule update directory");
+        return FOTA_STATUS_FW_INSTALLATION_FAILED;
+    }
+
+    int length = snprintf(command,
+                          ACTIVATE_SCRIPT_LENGTH,
+                          "cp -f %s " BOOT_CAPSULE_UPDATE_DIR "/" BOOT_CAPSULE_UPDATE_FILENAME, file_name);
+    FOTA_ASSERT(length < ACTIVATE_SCRIPT_LENGTH);
+
+    rc = system(command);
+    if (rc) {
+        FOTA_TRACE_ERROR("Unable to copy capsule file to capsule directory");
+        return FOTA_STATUS_FW_INSTALLATION_FAILED;
+    }
     return FOTA_STATUS_SUCCESS;
 }
 
 int boot_sub_component_verify_handler(const char *comp_name, const char *sub_comp_name, const uint8_t *vendor_data, size_t vendor_data_size)
 {
-    FOTA_TRACE_DEBUG("boot_sub_component_verify_handler comp %s, subcomp %s", comp_name, sub_comp_name);
+    // Currently only way to verify success of capsule update is to make sure that capsule update process removed the capsule file
+    FILE *fp = fopen(BOOT_CAPSULE_UPDATE_DIR "/" BOOT_CAPSULE_UPDATE_FILENAME, "r");
+    if (fp) {
+        FOTA_TRACE_ERROR("Capsule update process failed");
+        fclose(fp);
+        return FOTA_STATUS_FW_INSTALLATION_FAILED;
+    }
     return FOTA_STATUS_SUCCESS;
 }
 
 int boot_sub_component_rollback_handler(const char *comp_name, const char *sub_comp_name, const uint8_t *vendor_data, size_t vendor_data_size)
 {
-    FOTA_TRACE_DEBUG("boot_sub_component_rollback_handler comp %s, subcomp %s", comp_name, sub_comp_name);
+    // Nothing to do here
     return FOTA_STATUS_SUCCESS;
 }
 
 int boot_sub_component_finalize_handler(const char *comp_name, const char *sub_comp_name, const uint8_t *vendor_data, size_t vendor_data_size, fota_status_e fota_status)
 {
-    FOTA_TRACE_DEBUG("boot_sub_component_finalize_handler comp %s, subcomp %s", comp_name, sub_comp_name);
+    remove(BOOT_CAPSULE_UPDATE_DIR "/" BOOT_CAPSULE_UPDATE_FILENAME);
     return FOTA_STATUS_SUCCESS;
 }
 
diff --git a/lib/mbed-cloud-client b/lib/mbed-cloud-client
index 105a184..8a30590 160000
--- a/lib/mbed-cloud-client
+++ b/lib/mbed-cloud-client
@@ -1 +1 @@
-Subproject commit 105a1846277c80e5eb15ad74de7e4d7b15e57c26
+Subproject commit 8a30590179cdfb4c6949a7f5b14cae39448d8454