diff --git a/package.json b/package.json
index 5a74571484f..dd2ac7e0ab9 100644
--- a/package.json
+++ b/package.json
@@ -44,8 +44,7 @@
     "espree": "^3.1.6",
     "estraverse": "^4.2.0",
     "esutils": "^2.0.2",
-    "file-entry-cache": "1.2.4",
-    "flat-cache": "1.0.10",
+    "file-entry-cache": "^1.3.1",
     "glob": "^7.0.3",
     "globals": "^9.2.0",
     "ignore": "^3.1.2",