diff --git a/composer.json b/composer.json
index c2a2d3e..6ec132f 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
         "hhvm/hsl": "^4.40",
         "nuxed/contract": "^1.0",
         "hhvm/type-assert": "^3.6",
-        "nuxed/filesystem": "^1.4",
+        "nuxed/filesystem": "^1.5",
         "nuxed/json": "^1.0"
     },
     "require-dev": {
@@ -36,4 +36,4 @@
         "test": "hacktest tests/",
         "type-check": "hh_client src/"
     }
-}
\ No newline at end of file
+}