diff --git a/features/mbedtls/VERSION.txt b/features/mbedtls/VERSION.txt
index 23e318506b..0cf957bbef 100644
--- a/features/mbedtls/VERSION.txt
+++ b/features/mbedtls/VERSION.txt
@@ -1 +1 @@
-development
+mbedtls-2.17.0
diff --git a/features/mbedtls/importer/Makefile b/features/mbedtls/importer/Makefile
index 1ba8c3c6eb..fe79056685 100644
--- a/features/mbedtls/importer/Makefile
+++ b/features/mbedtls/importer/Makefile
@@ -27,7 +27,7 @@
 #
 
 # Set the mbed TLS release to import (this can/should be edited before import)
-MBED_TLS_RELEASE ?= development
+MBED_TLS_RELEASE ?= mbedtls-2.17.0
 MBED_TLS_REPO_URL ?= git@github.com:ARMmbed/mbedtls.git
 
 # Translate between mbed TLS namespace and mbed namespace