diff --git a/package.json b/package.json
index cdd95cc264d8c..9f3d3d0970d80 100644
--- a/package.json
+++ b/package.json
@@ -87,7 +87,7 @@
     "typescript": "~1.8.10"
   },
   "devEngines": {
-    "node": "8.x || 9.x || 10.x || 11.x"
+    "node": "8.x || 9.x || 10.x"
   },
   "jest": {
     "testRegex": "/scripts/jest/dont-run-jest-directly\\.js$"
diff --git a/packages/shared/ReactFeatureFlags.js b/packages/shared/ReactFeatureFlags.js
index 8ccb62cdae964..028b5a8e32d96 100644
--- a/packages/shared/ReactFeatureFlags.js
+++ b/packages/shared/ReactFeatureFlags.js
@@ -9,7 +9,7 @@
 
 export const enableUserTimingAPI = __DEV__;
 
-export const enableHooks = true;
+export const enableHooks = false;
 // Helps identify side effects in begin-phase lifecycle hooks and setState reducers:
 export const debugRenderPhaseSideEffects = false;