fabric-node4-support.diff

diff --git a/fabric-ca-client/package.json b/fabric-ca-client/package.json
index b4f0ffb..2642c3d 100644
--- a/fabric-ca-client/package.json
+++ b/fabric-ca-client/package.json
@@ -7,11 +7,9 @@
     "url": "http://gerrit.hyperledger.org/r/fabric-sdk-node"
   },
   "engines": {
-    "node": ">=6.9.0 <7.0",
+    "node": ">=4.5.0",
     "npm": ">=3.10.0"
   },
-  "engine-strict": true,
-  "engineStrict": true,
   "dependencies": {
     "bn.js": "^4.11.3",
     "elliptic": "^6.2.3",
diff --git a/fabric-client/package.json b/fabric-client/package.json
index bdb6e8c..719a2b1 100644
--- a/fabric-client/package.json
+++ b/fabric-client/package.json
@@ -10,11 +10,9 @@
     "test": "node test/unit/headless-tests.js"
   },
   "engines": {
-    "node": ">=6.9.0 <7.0",
+    "node": ">=4.5.0",
     "npm": ">=3.10.0"
   },
-  "engine-strict": true,
-  "engineStrict": true,
   "dependencies": {
     "bn.js": "^4.11.3",
     "callsite": "^1.0.0",
diff --git a/package.json b/package.json
index b5e71be..dd67d58 100644
--- a/package.json
+++ b/package.json
@@ -13,8 +13,6 @@
     "node": ">=4.5.0",
     "npm": ">=2.15.9"
   },
-  "engine-strict": true,
-  "engineStrict": true,
   "devDependencies": {
     "bn.js": "^4.11.6",
     "bunyan": "^1.8.10",
diff --git a/test/unit/util.js b/test/unit/util.js
index 1daec00..6013093 100644
--- a/test/unit/util.js
+++ b/test/unit/util.js
@@ -13,6 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
+'use strict';
 
 var path = require('path');
 var fs = require('fs-extra');