diff --git a/package-lock.json b/package-lock.json
index cac4166..c1ba934 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,40 +1,48 @@
 {
   "name": "ember-simple-auth-token",
-  "version": "4.0.3",
+  "version": "4.0.4",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
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-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@ember/ordered-set/-/ordered-set-1.0.0.tgz",
-      "integrity": "sha1-z5q1/XUQvK03A3Drze1wX20cVCs=",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@ember/ordered-set/-/ordered-set-1.0.1.tgz",
+      "integrity": "sha1-8ajHMRaPsM4l+GgRj/7yZqzim6w=",
       "dev": true,
       "requires": {
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-      }
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-      "resolved": "https://registry.npmjs.org/@ember/test-helpers/-/test-helpers-0.7.22.tgz",
-      "integrity": "sha512-6j62XnemaHbvJyGioOxt3pvmLbVWAe3askFjenWBLKTL/3Ni9unNbrQHFbwXtOfUpVahIdQmvHGszPMcqxQk7Q==",
-      "dev": true,
-      "requires": {
-        "broccoli-funnel": "^2.0.1",
-        "ember-cli-babel": "^6.12.0",
-        "ember-cli-htmlbars-inline-precompile": "^1.0.0"
+        "ember-compatibility-helpers": "^1.0.0"
       },
       "dependencies": {
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+          "version": "0.0.7",
+          "resolved": "https://registry.npmjs.org/amd-name-resolver/-/amd-name-resolver-0.0.7.tgz",
+          "integrity": "sha1-gUMBrf6KLxCfboTV6TUZbvtmlhU=",
+          "dev": true,
+          "requires": {
+            "ensure-posix-path": "^1.0.1"
+          }
+        },
+        "babel-plugin-debug-macros": {
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+          "resolved": "https://registry.npmjs.org/babel-plugin-debug-macros/-/babel-plugin-debug-macros-0.1.11.tgz",
+          "integrity": "sha512-hZw5qNNGAR02Y+yBUrtsnJHh8OXavkayPRqKGAXnIm4t5rWVpj3ArwsC7TWdpZsBguQvHAeyTxZ7s23yY60HHg==",
+          "dev": true,
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+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/broccoli-funnel/-/broccoli-funnel-1.2.0.tgz",
+          "integrity": "sha1-zdw6/F/xaFqAI0iP/3TOb7WlEpY=",
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             "broccoli-plugin": "^1.3.0",
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             "fs-tree-diff": "^0.5.3",
             "heimdalljs": "^0.2.0",
@@ -45,9 +53,41 @@
             "symlink-or-copy": "^1.0.0",
             "walk-sync": "^0.3.1"
           }
+        },
+        "ember-cli-babel": {
+          "version": "6.12.0",
+          "resolved": "https://registry.npmjs.org/ember-cli-babel/-/ember-cli-babel-6.12.0.tgz",
+          "integrity": "sha512-LMwZ3Xf3Q3jQUXaJtLLJsbbhRZRNv/iea64lZ8OgqZp1fh66CSXfmqV3L9QSuYQKPDNqFiu2v6IpOT08C6GU6w==",
+          "dev": true,
+          "requires": {
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+            "babel-plugin-debug-macros": "^0.1.11",
+            "babel-plugin-ember-modules-api-polyfill": "^2.3.0",
+            "babel-plugin-transform-es2015-modules-amd": "^6.24.0",
+            "babel-polyfill": "^6.16.0",
+            "babel-preset-env": "^1.5.1",
+            "broccoli-babel-transpiler": "^6.1.2",
+            "broccoli-debug": "^0.6.2",
+            "broccoli-funnel": "^1.0.0",
+            "broccoli-source": "^1.1.0",
+            "clone": "^2.0.0",
+            "ember-cli-version-checker": "^2.1.0",
+            "semver": "^5.4.1"
+          }
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+    "@ember/test-helpers": {
+      "version": "0.7.25",
+      "resolved": "https://registry.npmjs.org/@ember/test-helpers/-/test-helpers-0.7.25.tgz",
+      "integrity": "sha1-tAFMEItA/69088TVkYgAkXVBVB0=",
+      "dev": true,
+      "requires": {
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+        "ember-cli-babel": "^6.12.0",
+        "ember-cli-htmlbars-inline-precompile": "^1.0.0"
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       "resolved": "https://registry.npmjs.org/@glimmer/di/-/di-0.2.0.tgz",
@@ -71,13 +111,24 @@
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-      "resolved": "http://registry.npmjs.org/@sinonjs/formatio/-/formatio-2.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/@sinonjs/formatio/-/formatio-2.0.0.tgz",
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       "dev": true,
       "requires": {
         "samsam": "1.3.0"
       }
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+    "@sinonjs/samsam": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/@sinonjs/samsam/-/samsam-2.0.0.tgz",
+      "integrity": "sha512-D7VxhADdZbDJ0HjUTMnSQ5xIGb4H2yWpg8k9Sf1T08zfFiQYlaxM8LZydpR4FQ2E6LZJX8IlabNZ5io4vdChwg==",
+      "dev": true
+    },
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+      "resolved": "https://registry.npmjs.org/@xg-wang/whatwg-fetch/-/whatwg-fetch-3.0.0.tgz",
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@@ -100,9 +151,9 @@
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+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.1.tgz",
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@@ -158,9 +209,9 @@
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-      "integrity": "sha1-gUMBrf6KLxCfboTV6TUZbvtmlhU=",
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-      "integrity": "sha1-u13KOCu5TwXhUZQ3PRb9O6HKEQ0=",
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@@ -367,12 +418,6 @@
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-        "lodash": "^4.14.0"
+        "lodash": "^4.17.10"
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@@ -405,6 +450,13 @@
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         "rsvp": "^3.0.18",
         "username-sync": "1.0.1"
+      },
+      "dependencies": {
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+          "resolved": "https://registry.npmjs.org/rsvp/-/rsvp-3.6.2.tgz",
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+        }
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@@ -634,17 +686,17 @@
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@@ -1162,12 +1214,6 @@
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@@ -1175,6 +1221,14 @@
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+          "dev": true
+        }
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@@ -1245,21 +1299,21 @@
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-      "integrity": "sha1-h2eKGdhLR9hZuDGZvVm84iKxBFQ=",
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@@ -1331,6 +1385,14 @@
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         "minimatch": "^3.0.4",
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+      },
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+          "dev": true
+        }
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@@ -1343,57 +1405,43 @@
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-        "broccoli-merge-trees": "^1.0.0",
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+      "integrity": "sha1-S3ni+ETeEaThuBbD9Jxt9HdsMS0=",
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+          "dev": true
+        }
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@@ -1408,6 +1456,14 @@
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+          "dev": true
+        }
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@@ -1423,32 +1479,89 @@
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+      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
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       "dev": true,
       "requires": {
         "isexe": "^2.0.0"
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     "wide-align": {
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-      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.2.tgz",
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+      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
+      "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
       "dev": true,
       "requires": {
-        "string-width": "^1.0.2"
-      },
-      "dependencies": {
-        "is-fullwidth-code-point": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
-          "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
-          "dev": true,
-          "requires": {
-            "number-is-nan": "^1.0.0"
-          }
-        },
-        "string-width": {
-          "version": "1.0.2",
-          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
-          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
-          "dev": true,
-          "requires": {
-            "code-point-at": "^1.0.0",
-            "is-fullwidth-code-point": "^1.0.0",
-            "strip-ansi": "^3.0.0"
-          }
-        }
+        "string-width": "^1.0.2 || 2"
       }
     },
     "window-size": {
@@ -13288,9 +13208,9 @@
       "dev": true
     },
     "workerpool": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-2.3.0.tgz",
-      "integrity": "sha512-JP5DpviEV84zDmz13QnD4FfRjZBjnTOYY2O4pGgxtlqLh47WOzQFHm8o17TE5OSfcDoKC6vHSrN4yPju93DW0Q==",
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-2.3.1.tgz",
+      "integrity": "sha512-KdF/veTxbGCtJvQv/6ncHEvbFpUqGzkxDMeACnuQrErafJoigxjgv0x4IMq4/SmSPX+AoRf1OdtkjHsmAzhJPQ==",
       "requires": {
         "object-assign": "4.1.1"
       }
@@ -13369,28 +13289,6 @@
       "requires": {
         "fs-extra": "^4.0.2",
         "lodash.merge": "^4.6.0"
-      },
-      "dependencies": {
-        "fs-extra": {
-          "version": "4.0.3",
-          "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-4.0.3.tgz",
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-          "dev": true,
-          "requires": {
-            "graceful-fs": "^4.1.2",
-            "jsonfile": "^4.0.0",
-            "universalify": "^0.1.0"
-          }
-        },
-        "jsonfile": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
-          "integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
-          "dev": true,
-          "requires": {
-            "graceful-fs": "^4.1.6"
-          }
-        }
       }
     },
     "yargs": {
@@ -13411,11 +13309,6 @@
       "resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
       "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk=",
       "dev": true
-    },
-    "yetch": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/yetch/-/yetch-0.0.1.tgz",
-      "integrity": "sha512-Zl5SG98t7zLphqFAFsgXeyQF6i7MvsErop0Kb6CSyjQLR5qNXcvvwwBDKuF4X2m9/HWXgmHX/HPaZuMU1isXaQ=="
     }
   }
 }
diff --git a/package.json b/package.json
index 21a655d..4477126 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ember-simple-auth-token",
-  "version": "4.0.3",
+  "version": "4.0.4",
   "description": "An authenticator and authorizer for Ember Simple Auth that is compatible with token-based authentication like JWT in Ember CLI applications.",
   "directories": {
     "doc": "doc",
@@ -24,7 +24,7 @@
   "dependencies": {
     "ember-cli-babel": "^6.6.0",
     "ember-get-config": "^0.2.4",
-    "ember-fetch": "^4.0.1",
+    "ember-fetch": "^4.0.0 || ^5.0.0",
     "ember-simple-auth": "^1.6.0"
   },
   "devDependencies": {