diff --git a/.circleci/config.yml b/.circleci/config.yml
index 52fa7c3..4bd049f 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -9,7 +9,7 @@ jobs:
       - checkout
       - run:
           name: Install dependencies
-          command: 'apt-get update && apt-get install -y sudo git gcc g++ build-essential cmake bash curl uuid-dev && rm -rf /var/lib/apt/lists/*'
+          command: 'apt-get update && apt-get install -y sudo git gcc g++ build-essential cmake bash curl uuid-dev software-properties-common python && rm -rf /var/lib/apt/lists/*'
       - run:
           name: Fetch submodules
           command: 'git submodule update --init --recursive'
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d1bc9be..fb082f9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,7 +20,7 @@ set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake" ${CMAKE_MODULE_PATH})
 
 set(${PROJECT_NAME}_MAJOR 4)
 set(${PROJECT_NAME}_MINOR 0)
-set(${PROJECT_NAME}_PATCH 1)
+set(${PROJECT_NAME}_PATCH 2)
 set(${PROJECT_NAME}_VERSION_STRING "${${PROJECT_NAME}_MAJOR}.${${PROJECT_NAME}_MINOR}.${${PROJECT_NAME}_PATCH}")
 
 option(${PROJECT_NAME}_ENABLE_TESTS "Build tests." OFF)
diff --git a/include/cecies/constants.h b/include/cecies/constants.h
index 51be077..6e3224c 100644
--- a/include/cecies/constants.h
+++ b/include/cecies/constants.h
@@ -45,12 +45,12 @@ extern "C" {
  * The version number of this CECIES implementation.
  * TODO: increase this and below string version accordingly BEFORE releasing new updates!
  */
-#define CECIES_VERSION 401
+#define CECIES_VERSION 402
 
 /**
  * The version number of this CECIES implementation (nicely-formatted string).
  */
-#define CECIES_VERSION_STR "4.0.1"
+#define CECIES_VERSION_STR "4.0.2"
 
 /**
  * Key size (in bytes) of an X25519 key (both public and private key have the same length).
diff --git a/lib/mbedtls b/lib/mbedtls
index 8df2f8e..d65aeb3 160000
--- a/lib/mbedtls
+++ b/lib/mbedtls
@@ -1 +1 @@
-Subproject commit 8df2f8e7b9c7bb9390ac74bb7bace27edca81a2b
+Subproject commit d65aeb37349ad1a50e0f6c9b694d4b5290d60e49