diff --git a/package.json b/package.json
index 6d394ec..6c44d68 100644
--- a/package.json
+++ b/package.json
@@ -28,32 +28,32 @@
     "tslib": "^1.9.3"
   },
   "devDependencies": {
-    "@types/chai": "^4.1.7",
-    "@types/dirty-chai": "^2.0.0",
-    "@types/mocha": "^5.2.7",
-    "@types/node": "^12.0.4",
-    "chai": "^4.2.0",
-    "coveralls": "^3.0.3",
-    "cross-env": "^5.2.0",
-    "dirty-chai": "^2.0.1",
-    "eslint": "^5.16.0",
-    "eslint-config-prettier": "^4.3.0",
-    "eslint-plugin-import": "^2.17.3",
-    "eslint-plugin-node": "^9.1.0",
-    "eslint-plugin-promise": "^4.1.1",
-    "make-dir": "^3.0.0",
-    "markdownlint-cli": "^0.16.0",
-    "mocha": "^6.1.4",
-    "nyc": "^14.1.1",
-    "prettier": "^1.17.1",
-    "promise-readable": "^4.2.1",
-    "promise-writable": "^4.1.1",
-    "shx": "^0.3.2",
-    "stream.pipeline-shim": "^1.1.0",
-    "ts-node": "^8.2.0",
-    "tslint": "^5.17.0",
-    "tslint-config-prettier": "^1.18.0",
-    "typescript": "^3.5.1"
+    "@types/chai": "4.1.7",
+    "@types/dirty-chai": "2.0.0",
+    "@types/mocha": "5.2.7",
+    "@types/node": "12.6.1",
+    "chai": "4.2.0",
+    "coveralls": "3.0.4",
+    "cross-env": "5.2.0",
+    "dirty-chai": "2.0.1",
+    "eslint": "5.16.0",
+    "eslint-config-prettier": "4.3.0",
+    "eslint-plugin-import": "2.18.0",
+    "eslint-plugin-node": "9.1.0",
+    "eslint-plugin-promise": "4.2.1",
+    "make-dir": "3.0.0",
+    "markdownlint-cli": "0.16.0",
+    "mocha": "6.1.4",
+    "nyc": "14.1.1",
+    "prettier": "1.18.2",
+    "promise-readable": "4.2.1",
+    "promise-writable": "4.1.1",
+    "shx": "0.3.2",
+    "stream.pipeline-shim": "1.1.0",
+    "ts-node": "8.3.0",
+    "tslint": "5.18.0",
+    "tslint-config-prettier": "1.18.0",
+    "typescript": "3.5.3"
   },
   "scripts": {
     "compile": "tsc --pretty --project .",