diff --git a/package.json b/package.json
index 428d232..898e009 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "symlink-or-copy": "^1.0.1",
     "sync-disk-cache": "^1.3.3",
     "walk-sync": "^1.0.0",
-    "fs-merger": "^1.0.3"
+    "fs-merger": "^1.0.4"
   },
   "devDependencies": {
     "broccoli-test-helper": "^2.0.0",
diff --git a/yarn.lock b/yarn.lock
index 178cdbc..2ce4ad9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -915,10 +915,10 @@ fs-extra@^8.0.1:
     jsonfile "^4.0.0"
     universalify "^0.1.0"
 
-fs-merger@^1.0.3:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/fs-merger/-/fs-merger-1.0.3.tgz#cfb93a6a4d58181d185c621dc007a3d26cba5788"
-  integrity sha512-YZfhvibDsxNNdMtiOCQ7R5UzeGVhy9TsN6gYlZ6Br5Q4fG2lIol7Dj28ixEeV4AaCYaLpQGZduuq3RfFSjc8NA==
+fs-merger@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/fs-merger/-/fs-merger-1.0.4.tgz#56bcad650b7ca76c4399807c08db508502e9f647"
+  integrity sha512-piaxIiSVMFglYGSodmkrlVH4RGmRf9idvW6M2l53JrXaCH7qEvVvrLa4jTX4d3ag/SyerhsbQQWkF+Ita8hE7w==
   dependencies:
     fs-extra "^8.0.1"
     fs-tree-diff "^2.0.1"