diff --git a/ChangeLog.d/drop-msvc-2015-and-armcc-5.txt b/ChangeLog.d/drop-msvc-2015-and-armcc-5.txt
new file mode 100644
index 0000000..de37c27
--- /dev/null
+++ b/ChangeLog.d/drop-msvc-2015-and-armcc-5.txt
@@ -0,0 +1,2 @@
+Requirement changes
+   * Drop support for MSVC 2013, 2015 and Arm Compiler 5.
diff --git a/README.md b/README.md
index 2505d8f..f22a453 100644
--- a/README.md
+++ b/README.md
@@ -47,11 +47,11 @@
 You need the following tools to build the library with the provided makefiles:
 
 * GNU Make 3.82 or a build tool that CMake supports.
-* A C99 toolchain (compiler, linker, archiver). We actively test with GCC 5.4, Clang 3.8, IAR 8 and Visual Studio 2013. More recent versions should work. Slightly older versions may work.
+* A C99 toolchain (compiler, linker, archiver). We actively test with GCC 5.4, Clang 3.8, Arm Compiler 6, IAR 8 and Visual Studio 2017. More recent versions should work. Slightly older versions may work.
 * Python 3.8 to generate the test code. Python is also needed to integrate PSA drivers and to build the development branch (see next section).
 * Perl to run the tests, and to generate some source files in the development branch.
 * CMake 3.10.2 or later (if using CMake).
-* Microsoft Visual Studio 2013 or later (if using Visual Studio).
+* Microsoft Visual Studio 2017 or later (if using Visual Studio).
 * Doxygen 1.8.11 or later (if building the documentation; slightly older versions should work).
 
 ### Generated source files in the development branch
@@ -221,7 +221,7 @@
 
 ### Microsoft Visual Studio
 
-The build files for Microsoft Visual Studio are generated for Visual Studio 2013.
+The build files for Microsoft Visual Studio are generated for Visual Studio 2017.
 
 The solution file `mbedTLS.sln` contains all the basic projects needed to build the library and all the programs. The files in tests are not generated and compiled, as these need Python and perl environments as well. However, the selftest program in `programs/test/` is still available.