diff --git a/libs/base/shims.d.ts b/libs/base/shims.d.ts
index d54c32f0..6cc66c9e 100644
--- a/libs/base/shims.d.ts
+++ b/libs/base/shims.d.ts
@@ -87,6 +87,12 @@ declare interface Buffer {
      */
     //% shim=BufferMethods::write
     write(dstOffset: int32, src: Buffer): void;
+
+    /**
+     * Compute k-bit FNV-1 non-cryptographic hash of the buffer.
+     */
+    //% shim=BufferMethods::hash
+    hash(bits: int32): uint32;
 }
 declare namespace control {
 
@@ -94,14 +100,14 @@ declare namespace control {
      * Create a new zero-initialized buffer.
      * @param size number of bytes in the buffer
      */
-    //% shim=control::createBuffer
+    //% deprecated=1 shim=control::createBuffer
     function createBuffer(size: int32): Buffer;
 
     /**
      * Create a new buffer with UTF8-encoded string
      * @param str the string to put in the buffer
      */
-    //% shim=control::createBufferFromUTF8
+    //% deprecated=1 shim=control::createBufferFromUTF8
     function createBufferFromUTF8(str: string): Buffer;
 }
 declare namespace loops {
diff --git a/package.json b/package.json
index 13f79254..cc48a211 100644
--- a/package.json
+++ b/package.json
@@ -32,21 +32,21 @@
     "docs/*/*/*.md"
   ],
   "devDependencies": {
-    "typescript": "2.6.1",
     "react": "16.8.3",
-    "semantic-ui-less": "2.2.14",
-    "@types/bluebird": "2.0.33",
-    "@types/marked": "0.3.0",
-    "@types/node": "8.0.53",
     "webfonts-generator": "^0.4.0",
     "@types/jquery": "3.2.16",
     "@types/react": "16.0.25",
     "@types/react-dom": "16.0.3",
-    "@types/web-bluetooth": "0.0.4"
+    "@types/web-bluetooth": "0.0.4",
+    "@types/bluebird": "^2.0.33",
+    "@types/marked": "^0.3.0",
+    "@types/node": "^9.3.0",
+    "semantic-ui-less": "2.2.14",
+    "typescript": "^3.7.5"
   },
   "dependencies": {
-    "pxt-common-packages": "6.18.2",
-    "pxt-core": "5.32.3"
+    "pxt-common-packages": "8.1.3",
+    "pxt-core": "6.2.8"
   },
   "scripts": {
     "test": "node node_modules/pxt-core/built/pxt.js travis"