diff --git a/targets/microbit-s110v8.json b/targets/microbit-s110v8.json
index 02c90153..c5d34c5c 100644
--- a/targets/microbit-s110v8.json
+++ b/targets/microbit-s110v8.json
@@ -1,3 +1,4 @@
 {
-	"inherits": ["microbit", "nrf51-s110v8"]
+	"inherits": ["microbit", "nrf51-s110v8"],
+	"flash-method": "openocd"
 }
diff --git a/targets/reelboard-s140v7.json b/targets/reelboard-s140v7.json
index 7e658c7d..4d1adfc0 100644
--- a/targets/reelboard-s140v7.json
+++ b/targets/reelboard-s140v7.json
@@ -1,3 +1,4 @@
 {
-	"inherits": ["reelboard", "nrf52840-s140v7"]
+	"inherits": ["reelboard", "nrf52840-s140v7"],
+	"flash-method": "openocd"
 }