Upgrade to latest mbed-drivers version
diff --git a/yotta/data/example-authcrypt/main.cpp b/yotta/data/example-authcrypt/main.cpp
index c64cdb4..2377510 100644
--- a/yotta/data/example-authcrypt/main.cpp
+++ b/yotta/data/example-authcrypt/main.cpp
@@ -173,8 +173,9 @@
 #if defined(TARGET_LIKE_MBED)
 
 #include "mbed/test_env.h"
+#include "minar/minar.h"
 
-int main() {
+static void run() {
     /* Use 115200 bps for consistency with other examples */
     Serial pc(USBTX, USBRX);
     pc.baud(115200);
@@ -186,6 +187,10 @@
     MBED_HOSTTEST_RESULT(example() == 0);
 }
 
+void app_start(int, char*[]) {
+    minar::Scheduler::postCallback(FunctionPointer0<void>(run).bind());
+}
+
 #else
 
 int main() {