diff --git a/libs/screen/fieldeditors.ts b/libs/screen/fieldeditors.ts
new file mode 100644
index 00000000..37fd0f14
--- /dev/null
+++ b/libs/screen/fieldeditors.ts
@@ -0,0 +1,7 @@
+declare namespace images {
+    //% blockHidden=1
+    function _spriteImage(img: Image) : Image;
+
+    //% blockHidden=1
+    function _image(image: Image): Image;
+}
\ No newline at end of file
diff --git a/package.json b/package.json
index e44a83db..3dfdabdc 100644
--- a/package.json
+++ b/package.json
@@ -45,8 +45,8 @@
     "webfonts-generator": "^0.4.0"
   },
   "dependencies": {
-    "pxt-common-packages": "0.20.31",
-    "pxt-core": "3.7.1"
+    "pxt-common-packages": "0.20.38",
+    "pxt-core": "3.8.3"
   },
   "scripts": {
     "test": "node node_modules/pxt-core/built/pxt.js travis"