diff --git a/package.json b/package.json
index 474d2ce..91c2903 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
   },
   "dependencies": {
     "broccoli-debug": "^0.6.4",
-    "broccoli-plugin": "^2.0.0",
+    "broccoli-plugin": "^4.0.1",
     "ember-cli-babel": "^7.1.2",
     "fs-extra": "^8.0.1",
     "hash-for-dep": "^1.2.3",
diff --git a/yarn.lock b/yarn.lock
index 1ec09e3..8bcbfd9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1166,10 +1166,29 @@ broccoli-merge-trees@^3.0.2:
     broccoli-plugin "^1.3.0"
     merge-trees "^2.0.0"
 
+broccoli-node-api@^1.6.0, broccoli-node-api@^1.7.0:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/broccoli-node-api/-/broccoli-node-api-1.7.0.tgz#391aa6edecd2a42c63c111b4162956b2fa288cb6"
+  integrity sha512-QIqLSVJWJUVOhclmkmypJJH9u9s/aWH4+FH6Q6Ju5l+Io4dtwqdPUNmDfw40o6sxhbZHhqGujDJuHTML1wG8Yw==
+
 broccoli-node-info@1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/broccoli-node-info/-/broccoli-node-info-1.1.0.tgz#3aa2e31e07e5bdb516dd25214f7c45ba1c459412"
 
+broccoli-node-info@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/broccoli-node-info/-/broccoli-node-info-2.1.0.tgz#ca84560e8570ff78565bea1699866ddbf58ad644"
+  integrity sha512-l6qDuboJThHfRVVWQVaTs++bFdrFTP0gJXgsWenczc1PavRVUmL1Eyb2swTAXXMpDOnr2zhNOBLx4w9AxkqbPQ==
+
+broccoli-output-wrapper@^3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/broccoli-output-wrapper/-/broccoli-output-wrapper-3.1.1.tgz#d5f2c04b1259fd1df72e4d9951df2d23f202d301"
+  integrity sha512-iIA5EJ7jmG7rmAFerJ1Fi57L7NICN6ErVhw8ClLDVBrLQYXK0uWicwXL2/2HWlGIL0oFFrIiw+/W0BNVib6DSA==
+  dependencies:
+    fs-extra "^8.1.0"
+    heimdalljs-logger "^0.1.10"
+    symlink-or-copy "^1.2.0"
+
 broccoli-persistent-filter@^2.2.1:
   version "2.3.1"
   resolved "https://registry.yarnpkg.com/broccoli-persistent-filter/-/broccoli-persistent-filter-2.3.1.tgz#4a052e0e0868b344c3a2977e35a3d497aa9eca72"
@@ -1199,15 +1218,18 @@ broccoli-plugin@^1.0.0, broccoli-plugin@^1.2.1, broccoli-plugin@^1.3.0:
     rimraf "^2.3.4"
     symlink-or-copy "^1.1.8"
 
-broccoli-plugin@^2.0.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/broccoli-plugin/-/broccoli-plugin-2.1.0.tgz#2fab6c578219cfcc64f773e9616073313fc8b334"
-  integrity sha512-ElE4caljW4slapyEhSD9jU9Uayc8SoSABWdmY9SqbV8DHNxU6xg1jJsPcMm+cXOvggR3+G+OXAYQeFjWVnznaw==
+broccoli-plugin@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/broccoli-plugin/-/broccoli-plugin-4.0.1.tgz#5a0468a9c8e02f763d5c162ced0a5930db4567a9"
+  integrity sha512-rBYVtV1rWvlDS8fd+CUUG7L/TO5VUCRjaGm2HEOBaTwUYQKswKJXLRSxwv0CYLo3QfVZJpI1akcn7NGe9kywIQ==
   dependencies:
+    broccoli-node-api "^1.6.0"
+    broccoli-output-wrapper "^3.1.1"
+    fs-merger "^3.0.1"
     promise-map-series "^0.2.1"
     quick-temp "^0.1.3"
-    rimraf "^2.3.4"
-    symlink-or-copy "^1.1.8"
+    rimraf "^3.0.0"
+    symlink-or-copy "^1.3.0"
 
 broccoli-slow-trees@^3.0.1:
   version "3.0.1"
@@ -2021,7 +2043,7 @@ fs-extra@^0.30.0:
     path-is-absolute "^1.0.0"
     rimraf "^2.2.8"
 
-fs-extra@^8.0.1:
+fs-extra@^8.0.1, fs-extra@^8.1.0:
   version "8.1.0"
   resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-8.1.0.tgz#49d43c45a88cd9677668cb7be1b46efdb8d2e1c0"
   integrity sha512-yhlQgA6mnOJUKOsRUFsgJdQCvkKhcz8tlZG5HBQfReYZy46OwLcY+Zia0mtdHsOo9y/hP+CxMN0TU9QxoOtG4g==
@@ -2030,6 +2052,18 @@ fs-extra@^8.0.1:
     jsonfile "^4.0.0"
     universalify "^0.1.0"
 
+fs-merger@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/fs-merger/-/fs-merger-3.0.1.tgz#4fba891e1ac83ce1ea4261b91fee475aaf628cb2"
+  integrity sha512-0DDF7GDMm4roej5N6Z7ZNC2y2VdZdYQtHm32wWluSONyxUMqIAWyD73v0S12GkqO416BGqSHr2tjU4hmIlbylw==
+  dependencies:
+    broccoli-node-api "^1.7.0"
+    broccoli-node-info "^2.1.0"
+    fs-extra "^8.0.1"
+    fs-tree-diff "^2.0.1"
+    rimraf "^2.6.3"
+    walk-sync "^2.0.2"
+
 fs-tree-diff@^0.5.2, fs-tree-diff@^0.5.3, fs-tree-diff@^0.5.6, fs-tree-diff@^0.5.9:
   version "0.5.9"
   resolved "https://registry.yarnpkg.com/fs-tree-diff/-/fs-tree-diff-0.5.9.tgz#a4ec6182c2f5bd80b9b83c8e23e4522e6f5fd946"
@@ -2039,7 +2073,7 @@ fs-tree-diff@^0.5.2, fs-tree-diff@^0.5.3, fs-tree-diff@^0.5.6, fs-tree-diff@^0.5
     path-posix "^1.0.0"
     symlink-or-copy "^1.1.8"
 
-fs-tree-diff@^2.0.0:
+fs-tree-diff@^2.0.0, fs-tree-diff@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/fs-tree-diff/-/fs-tree-diff-2.0.1.tgz#343e4745ab435ec39ebac5f9059ad919cd034afa"
   integrity sha512-x+CfAZ/lJHQqwlD64pYM5QxWjzWhSjroaVsr8PW831zOApL55qPibed0c+xebaLWVr2BnHFoHdrwOv8pzt8R5A==
@@ -2244,7 +2278,7 @@ hash-for-dep@^1.2.3, hash-for-dep@^1.4.7, hash-for-dep@^1.5.0:
     resolve "^1.10.0"
     resolve-package-path "^1.0.11"
 
-heimdalljs-logger@^0.1.7, heimdalljs-logger@^0.1.9:
+heimdalljs-logger@^0.1.10, heimdalljs-logger@^0.1.7, heimdalljs-logger@^0.1.9:
   version "0.1.10"
   resolved "https://registry.yarnpkg.com/heimdalljs-logger/-/heimdalljs-logger-0.1.10.tgz#90cad58aabb1590a3c7e640ddc6a4cd3a43faaf7"
   integrity sha512-pO++cJbhIufVI/fmB/u2Yty3KJD0TqNPecehFae0/eps0hkZ3b4Zc/PezUMOpYuHFQbA7FxHZxa305EhmjLj4g==
@@ -2714,6 +2748,14 @@ matcher-collection@^1.1.1:
   dependencies:
     minimatch "^3.0.2"
 
+matcher-collection@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/matcher-collection/-/matcher-collection-2.0.1.tgz#90be1a4cf58d6f2949864f65bb3b0f3e41303b29"
+  integrity sha512-daE62nS2ZQsDg9raM0IlZzLmI2u+7ZapXBwdoeBUKAYERPDDIc0qNqA8E0Rp2D+gspKR7BgIFP52GeujaGXWeQ==
+  dependencies:
+    "@types/minimatch" "^3.0.3"
+    minimatch "^3.0.2"
+
 mem@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/mem/-/mem-4.0.0.tgz#6437690d9471678f6cc83659c00cbafcd6b0cdaf"
@@ -3339,10 +3381,17 @@ ret@~0.1.10:
   resolved "https://registry.yarnpkg.com/ret/-/ret-0.1.15.tgz#b8a4825d5bdb1fc3f6f53c2bc33f81388681c7bc"
   integrity sha512-TTlYpa+OL+vMMNG24xSlQGEJ3B/RzEfUlLct7b5G/ytav+wPrplCpVMFuwzXbkecJrb6IYo1iFb0S9v37754mg==
 
-rimraf@^2.2.8, rimraf@^2.3.4, rimraf@^2.4.3, rimraf@^2.5.3, rimraf@^2.5.4, rimraf@^2.6.1, rimraf@^2.6.2:
-  version "2.6.3"
-  resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.3.tgz#b2d104fe0d8fb27cf9e0a1cda8262dd3833c6cab"
-  integrity sha512-mwqeW5XsA2qAejG46gYdENaxXjx9onRNCfn7L0duuP4hCuTIi/QO7PDK07KJfp1d+izWPrzEJDcSqBa0OZQriA==
+rimraf@^2.2.8, rimraf@^2.3.4, rimraf@^2.4.3, rimraf@^2.5.3, rimraf@^2.5.4, rimraf@^2.6.1, rimraf@^2.6.2, rimraf@^2.6.3:
+  version "2.7.1"
+  resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.7.1.tgz#35797f13a7fdadc566142c29d4f07ccad483e3ec"
+  integrity sha512-uWjbaKIK3T1OSVptzX7Nl6PvQ3qAGtKEtVRjRuazjfL3Bx5eI409VZSqgND+4UNnmzLVdPj9FqFJNPqBZFve4w==
+  dependencies:
+    glob "^7.1.3"
+
+rimraf@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-3.0.0.tgz#614176d4b3010b75e5c390eb0ee96f6dc0cebb9b"
+  integrity sha512-NDGVxTsjqfunkds7CqsOiEnxln4Bo7Nddl3XhS4pXg5OzwkLqJ971ZVAAnB+DDLnF76N+VnDEiBHaVV8I06SUg==
   dependencies:
     glob "^7.1.3"
 
@@ -3642,9 +3691,10 @@ supports-color@^4.0.0:
   dependencies:
     has-flag "^2.0.0"
 
-symlink-or-copy@^1.0.0, symlink-or-copy@^1.0.1, symlink-or-copy@^1.1.8:
-  version "1.1.8"
-  resolved "https://registry.yarnpkg.com/symlink-or-copy/-/symlink-or-copy-1.1.8.tgz#cabe61e0010c1c023c173b25ee5108b37f4b4aa3"
+symlink-or-copy@^1.0.0, symlink-or-copy@^1.0.1, symlink-or-copy@^1.1.8, symlink-or-copy@^1.2.0, symlink-or-copy@^1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/symlink-or-copy/-/symlink-or-copy-1.3.0.tgz#a034398f11408ef083f51e0f7433040b6123ebf0"
+  integrity sha512-czheMn4hgCWK/nxqtm9On5JgUrl5KBPCdXYWZjvwiRQ4NA7XhdHY2GSASxQoVh+mbXPMoGcR7/MnngLtUZij4Q==
 
 sync-disk-cache@^1.3.3:
   version "1.3.3"
@@ -3877,6 +3927,15 @@ walk-sync@^1.0.0:
     ensure-posix-path "^1.1.0"
     matcher-collection "^1.1.1"
 
+walk-sync@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/walk-sync/-/walk-sync-2.0.2.tgz#5ea8a28377c8be68c92d50f4007ea381725da14b"
+  integrity sha512-dCZkrxfHjPn7tIvdYrX3uMD/R0beVrHpA8lROQ5wWrl8psJgR6xwCkwqTFes0dNujbS2o/ITpvSYgIFsLsf13A==
+  dependencies:
+    "@types/minimatch" "^3.0.3"
+    ensure-posix-path "^1.1.0"
+    matcher-collection "^2.0.0"
+
 walker@~1.0.5:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/walker/-/walker-1.0.7.tgz#2f7f9b8fd10d677262b18a884e28d19618e028fb"