diff --git a/package-lock.json b/package-lock.json
index 8bdcf51..ceb1c4a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1186,6 +1186,18 @@
         "ember-cli-string-utils": "^1.1.0",
         "ember-cli-typescript": "3.0.0",
         "ember-compatibility-helpers": "^1.1.2"
+      },
+      "dependencies": {
+        "broccoli-merge-trees": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/broccoli-merge-trees/-/broccoli-merge-trees-3.0.2.tgz",
+          "integrity": "sha512-ZyPAwrOdlCddduFbsMyyFzJUrvW6b04pMvDiAQZrCwghlvgowJDY+EfoXn+eR1RRA5nmGHJ+B68T63VnpRiT1A==",
+          "dev": true,
+          "requires": {
+            "broccoli-plugin": "^1.3.0",
+            "merge-trees": "^2.0.0"
+          }
+        }
       }
     },
     "@glimmer/di": {
@@ -3473,6 +3485,15 @@
             "symlink-or-copy": "^1.0.0",
             "walk-sync": "^0.3.1"
           }
+        },
+        "broccoli-merge-trees": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/broccoli-merge-trees/-/broccoli-merge-trees-3.0.2.tgz",
+          "integrity": "sha512-ZyPAwrOdlCddduFbsMyyFzJUrvW6b04pMvDiAQZrCwghlvgowJDY+EfoXn+eR1RRA5nmGHJ+B68T63VnpRiT1A==",
+          "requires": {
+            "broccoli-plugin": "^1.3.0",
+            "merge-trees": "^2.0.0"
+          }
         }
       }
     },
@@ -3840,12 +3861,28 @@
       }
     },
     "broccoli-merge-trees": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/broccoli-merge-trees/-/broccoli-merge-trees-3.0.2.tgz",
-      "integrity": "sha512-ZyPAwrOdlCddduFbsMyyFzJUrvW6b04pMvDiAQZrCwghlvgowJDY+EfoXn+eR1RRA5nmGHJ+B68T63VnpRiT1A==",
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/broccoli-merge-trees/-/broccoli-merge-trees-4.1.0.tgz",
+      "integrity": "sha512-1OXsksKPFiRdiZZOfh1z1mm7ZqKezlMS+DPBpHMDLSb6AhYHvoQfjf0KuMXbY8aoYskj7+Z+EJ5SsS/OC2v5yw==",
       "requires": {
-        "broccoli-plugin": "^1.3.0",
+        "broccoli-plugin": "^3.1.0",
         "merge-trees": "^2.0.0"
+      },
+      "dependencies": {
+        "broccoli-plugin": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/broccoli-plugin/-/broccoli-plugin-3.1.0.tgz",
+          "integrity": "sha512-7w7FP8WJYjLvb0eaw27LO678TGGaom++49O1VYIuzjhXjK5kn2+AMlDm7CaUFw4F7CLGoVQeZ84d8gICMJa4lA==",
+          "requires": {
+            "broccoli-node-api": "^1.6.0",
+            "broccoli-output-wrapper": "^2.0.0",
+            "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"
+          }
+        }
       }
     },
     "broccoli-middleware": {
@@ -4153,6 +4190,30 @@
             }
           }
         },
+        "broccoli-merge-trees": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/broccoli-merge-trees/-/broccoli-merge-trees-3.0.2.tgz",
+          "integrity": "sha512-ZyPAwrOdlCddduFbsMyyFzJUrvW6b04pMvDiAQZrCwghlvgowJDY+EfoXn+eR1RRA5nmGHJ+B68T63VnpRiT1A==",
+          "dev": true,
+          "requires": {
+            "broccoli-plugin": "^1.3.0",
+            "merge-trees": "^2.0.0"
+          },
+          "dependencies": {
+            "broccoli-plugin": {
+              "version": "1.3.1",
+              "resolved": "https://registry.npmjs.org/broccoli-plugin/-/broccoli-plugin-1.3.1.tgz",
+              "integrity": "sha512-DW8XASZkmorp+q7J4EeDEZz+LoyKLAd2XZULXyD9l4m9/hAKV3vjHmB1kiUshcWAYMgTP1m2i4NnqCE/23h6AQ==",
+              "dev": true,
+              "requires": {
+                "promise-map-series": "^0.2.1",
+                "quick-temp": "^0.1.3",
+                "rimraf": "^2.3.4",
+                "symlink-or-copy": "^1.1.8"
+              }
+            }
+          }
+        },
         "broccoli-plugin": {
           "version": "2.1.0",
           "resolved": "https://registry.npmjs.org/broccoli-plugin/-/broccoli-plugin-2.1.0.tgz",
@@ -6422,6 +6483,16 @@
             }
           }
         },
+        "broccoli-merge-trees": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/broccoli-merge-trees/-/broccoli-merge-trees-3.0.2.tgz",
+          "integrity": "sha512-ZyPAwrOdlCddduFbsMyyFzJUrvW6b04pMvDiAQZrCwghlvgowJDY+EfoXn+eR1RRA5nmGHJ+B68T63VnpRiT1A==",
+          "dev": true,
+          "requires": {
+            "broccoli-plugin": "^1.3.0",
+            "merge-trees": "^2.0.0"
+          }
+        },
         "broccoli-source": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/broccoli-source/-/broccoli-source-3.0.0.tgz",
@@ -8026,6 +8097,16 @@
             "symlink-or-copy": "^1.0.0",
             "walk-sync": "^0.3.1"
           }
+        },
+        "broccoli-merge-trees": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/broccoli-merge-trees/-/broccoli-merge-trees-3.0.2.tgz",
+          "integrity": "sha512-ZyPAwrOdlCddduFbsMyyFzJUrvW6b04pMvDiAQZrCwghlvgowJDY+EfoXn+eR1RRA5nmGHJ+B68T63VnpRiT1A==",
+          "dev": true,
+          "requires": {
+            "broccoli-plugin": "^1.3.0",
+            "merge-trees": "^2.0.0"
+          }
         }
       }
     },
@@ -8064,6 +8145,16 @@
             "walk-sync": "^0.3.1"
           }
         },
+        "broccoli-merge-trees": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/broccoli-merge-trees/-/broccoli-merge-trees-3.0.2.tgz",
+          "integrity": "sha512-ZyPAwrOdlCddduFbsMyyFzJUrvW6b04pMvDiAQZrCwghlvgowJDY+EfoXn+eR1RRA5nmGHJ+B68T63VnpRiT1A==",
+          "dev": true,
+          "requires": {
+            "broccoli-plugin": "^1.3.0",
+            "merge-trees": "^2.0.0"
+          }
+        },
         "ember-cli-version-checker": {
           "version": "3.1.3",
           "resolved": "https://registry.npmjs.org/ember-cli-version-checker/-/ember-cli-version-checker-3.1.3.tgz",
@@ -8145,6 +8236,16 @@
             "walk-sync": "^0.3.1"
           }
         },
+        "broccoli-merge-trees": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/broccoli-merge-trees/-/broccoli-merge-trees-3.0.2.tgz",
+          "integrity": "sha512-ZyPAwrOdlCddduFbsMyyFzJUrvW6b04pMvDiAQZrCwghlvgowJDY+EfoXn+eR1RRA5nmGHJ+B68T63VnpRiT1A==",
+          "dev": true,
+          "requires": {
+            "broccoli-plugin": "^1.3.0",
+            "merge-trees": "^2.0.0"
+          }
+        },
         "ember-cli-version-checker": {
           "version": "3.1.3",
           "resolved": "https://registry.npmjs.org/ember-cli-version-checker/-/ember-cli-version-checker-3.1.3.tgz",
diff --git a/package.json b/package.json
index a51f9eb..b49aa3e 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
   "dependencies": {
     "broccoli-caching-writer": "^3.0.3",
     "broccoli-funnel": "^3.0.2",
-    "broccoli-merge-trees": "^3.0.0",
+    "broccoli-merge-trees": "^4.1.0",
     "ember-cli-babel": "^7.17.2",
     "ember-cli-htmlbars": "^4.2.2",
     "rsvp": "^4.7.0",