diff --git a/package.json b/package.json
index a0c3494..b690f69 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "rollup-plugin-commonjs": "^10.0.0",
     "rollup-plugin-node-resolve": "^5.0.1",
     "sync-disk-cache": "^1.3.3",
-    "username": "^4.0.0"
+    "username": "^5.0.0"
   },
   "devDependencies": {
     "broccoli-test-helper": "^2.0.0",
diff --git a/yarn.lock b/yarn.lock
index 255042d..260cd1a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2618,14 +2618,14 @@ mem@^1.1.0:
   dependencies:
     mimic-fn "^1.0.0"
 
-mem@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/mem/-/mem-4.0.0.tgz#6437690d9471678f6cc83659c00cbafcd6b0cdaf"
-  integrity sha512-WQxG/5xYc3tMbYLXoXPm81ET2WDULiU5FxbuIoNbJqLOOI8zehXFdZuiUEgfdrU2mVB1pxBZUGlYORSrpuJreA==
+mem@^4.3.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/mem/-/mem-4.3.0.tgz#461af497bc4ae09608cdb2e60eefb69bff744178"
+  integrity sha512-qX2bG48pTqYRVmDB37rn/6PT7LcR8T7oAX3bf99u1Tt1nzxYfxkgqDwUwolPlXweM0XzBOBFzSx4kfp7KP1s/w==
   dependencies:
     map-age-cleaner "^0.1.1"
-    mimic-fn "^1.0.0"
-    p-is-promise "^1.1.0"
+    mimic-fn "^2.0.0"
+    p-is-promise "^2.0.0"
 
 merge-trees@^2.0.0:
   version "2.0.0"
@@ -2675,6 +2675,11 @@ mimic-fn@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-1.1.0.tgz#e667783d92e89dbd342818b5230b9d62a672ad18"
 
+mimic-fn@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-2.1.0.tgz#7ed2c2ccccaf84d3ffcb7a69b57711fc2083401b"
+  integrity sha512-OqbOk5oEQeAZ8WXWydlu9HJjz9WVdEIvamMCcXmuqUYjTknH/sqsWvhQ3vgwKFRR1HpjvNBKQ37nbJgYzGqGcg==
+
 "minimatch@2 || 3", minimatch@3.0.4, minimatch@^3.0.0, minimatch@^3.0.2, minimatch@^3.0.4:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
@@ -2877,10 +2882,10 @@ p-finally@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/p-finally/-/p-finally-1.0.0.tgz#3fbcfb15b899a44123b34b6dcc18b724336a2cae"
 
-p-is-promise@^1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/p-is-promise/-/p-is-promise-1.1.0.tgz#9c9456989e9f6588017b0434d56097675c3da05e"
-  integrity sha1-nJRWmJ6fZYgBewQ01WCXZ1w9oF4=
+p-is-promise@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/p-is-promise/-/p-is-promise-2.1.0.tgz#918cebaea248a62cf7ffab8e3bca8c5f882fc42e"
+  integrity sha512-Y3W0wlRPK8ZMRbNq97l4M5otioeA5lm1z7bkNkxCka8HSPjR0xRWmpCmc9utiaLP9Jb1eD8BgeIxTW4AIF45Pg==
 
 p-limit@^1.1.0:
   version "1.2.0"
@@ -3755,13 +3760,13 @@ username-sync@^1.0.2:
   resolved "https://registry.yarnpkg.com/username-sync/-/username-sync-1.0.2.tgz#0a3697909fb7b5768d29e2921f573acfdd427592"
   integrity sha512-ayNkOJdoNSGNDBE46Nkc+l6IXmeugbzahZLSMkwvgRWv5y5ZqNY2IrzcgmkR4z32sj1W3tM3TuTUMqkqBzO+RA==
 
-username@^4.0.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/username/-/username-4.1.0.tgz#640f2ae13d17c51e7fb1d3517ad7c17fcd5d1670"
-  integrity sha512-sKh1KCsMfv8jPIC9VdeQhrNAgkl842jS/M74HQv7Byr0AMAwKZt8mLWX9DmtMeD8nQA3eKa10f5LbqlSVmokMg==
+username@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/username/-/username-5.0.0.tgz#4c85696d85e0de29ac4a12369f247d5a0f1a51f9"
+  integrity sha512-iPfqmcRP2FMDeTFumQVCFKwi0L5npM8W/skqusA5okl8YSwAZi0mTNx04zjM14Kx66LG9IsMG4kIjsQvgz4rOQ==
   dependencies:
     execa "^1.0.0"
-    mem "^4.0.0"
+    mem "^4.3.0"
 
 util-deprecate@^1.0.2, util-deprecate@~1.0.1:
   version "1.0.2"