diff --git a/package.json b/package.json
index e85b23754..9e6ce4fd2 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
   },
   "dependencies": {
     "broccoli-funnel": "^2.0.0",
-    "broccoli-merge-trees": "^2.0.0"
+    "broccoli-merge-trees": "^3.0.1"
   },
   "devDependencies": {
     "@types/jest": "^23.1.3",
diff --git a/yarn.lock b/yarn.lock
index ba340aca9..c120ef7a7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1586,6 +1586,13 @@ broccoli-merge-trees@^2.0.0:
     broccoli-plugin "^1.3.0"
     merge-trees "^1.0.1"
 
+broccoli-merge-trees@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/broccoli-merge-trees/-/broccoli-merge-trees-3.0.1.tgz#545dfe9f695cec43372b3ee7e63c7203713ea554"
+  dependencies:
+    broccoli-plugin "^1.3.0"
+    merge-trees "^2.0.0"
+
 broccoli-middleware@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/broccoli-middleware/-/broccoli-middleware-1.0.0.tgz#92f4e1fb9a791ea986245a7077f35cc648dab097"
@@ -1890,6 +1897,10 @@ clean-css@^3.4.5:
     commander "2.8.x"
     source-map "0.4.x"
 
+clean-up-path@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/clean-up-path/-/clean-up-path-1.0.0.tgz#de9e8196519912e749c9eaf67c13d64fac72a3e5"
+
 cli-cursor@^1.0.1, cli-cursor@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/cli-cursor/-/cli-cursor-1.0.2.tgz#64da3f7d56a54412e59794bd62dc35295e8f2987"
@@ -3581,6 +3592,16 @@ fs-tree-diff@^0.5.2, fs-tree-diff@^0.5.3, fs-tree-diff@^0.5.4, fs-tree-diff@^0.5
     path-posix "^1.0.0"
     symlink-or-copy "^1.1.8"
 
+fs-updater@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/fs-updater/-/fs-updater-1.0.4.tgz#2329980f99ae9176e9a0e84f7637538a182ce63b"
+  dependencies:
+    can-symlink "^1.0.0"
+    clean-up-path "^1.0.0"
+    heimdalljs "^0.2.5"
+    heimdalljs-logger "^0.1.9"
+    rimraf "^2.6.2"
+
 fs.realpath@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
@@ -3994,7 +4015,7 @@ heimdalljs@^0.2.0, heimdalljs@^0.2.1, heimdalljs@^0.2.3:
   dependencies:
     rsvp "~3.2.1"
 
-heimdalljs@^0.2.6:
+heimdalljs@^0.2.5, heimdalljs@^0.2.6:
   version "0.2.6"
   resolved "https://registry.yarnpkg.com/heimdalljs/-/heimdalljs-0.2.6.tgz#b0eebabc412813aeb9542f9cc622cb58dbdcd9fe"
   dependencies:
@@ -5573,6 +5594,13 @@ merge-trees@^1.0.1:
     rimraf "^2.4.3"
     symlink-or-copy "^1.0.0"
 
+merge-trees@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/merge-trees/-/merge-trees-2.0.0.tgz#a560d796e566c5d9b2c40472a2967cca48d85161"
+  dependencies:
+    fs-updater "^1.0.4"
+    heimdalljs "^0.2.5"
+
 merge@^1.1.3:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/merge/-/merge-1.2.0.tgz#7531e39d4949c281a66b8c5a6e0265e8b05894da"
@@ -6812,6 +6840,12 @@ rimraf@^2.2.8, rimraf@^2.3.2, rimraf@^2.3.4, rimraf@^2.4.3, rimraf@^2.4.4, rimra
   dependencies:
     glob "^7.0.5"
 
+rimraf@^2.6.2:
+  version "2.6.2"
+  resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.2.tgz#2ed8150d24a16ea8651e6d6ef0f47c4158ce7a36"
+  dependencies:
+    glob "^7.0.5"
+
 rimraf@~2.2.6:
   version "2.2.8"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.2.8.tgz#e439be2aaee327321952730f99a8929e4fc50582"