diff --git a/package.json b/package.json
index 6f998e1..18d23a7 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
     "create-hash": "^1.1.0",
     "create-hmac": "^1.1.3",
     "ecurve": "^1.0.0",
-    "merkle-lib": "^1.0.0",
+    "merkle-lib": "^2.0.10",
     "pushdata-bitcoin": "^1.0.1",
     "randombytes": "^2.0.1",
     "typeforce": "^1.8.7",
@@ -72,7 +72,7 @@
     "coinselect": "^3.1.1",
     "minimaldata": "^1.0.2",
     "mocha": "^3.1.0",
-    "nyc": "^8.1.0",
+    "nyc": "^10.2.0",
     "proxyquire": "^1.4.0",
     "sinon": "^1.12.2",
     "standard": "^9.0.2"