diff --git a/package.json b/package.json
index dd4527b8..08b1e7bb 100644
--- a/package.json
+++ b/package.json
@@ -178,7 +178,7 @@
     "extract-text-webpack-plugin": "^4.0.0-alpha.0",
     "fast-async": "^7.0.6",
     "file-loader": "^1.1.4",
-    "gritty": "^3.0.0",
+    "gritty": "^3.0.1",
     "gunzip-maybe": "^1.3.1",
     "html-looks-like": "^1.0.2",
     "html-webpack-plugin": "^3.0.7",
@@ -199,9 +199,9 @@
     "request": "^2.76.0",
     "rimraf": "^2.5.4",
     "scroll-into-view-if-needed": "^2.2.5",
-    "serviceworker-webpack-plugin": "1.0.0-alpha02",
+    "serviceworker-webpack-plugin": "^1.0.1",
     "shortdate": "^1.0.1",
-    "sinon": "^6.0.0",
+    "sinon": "^6.0.4",
     "sinon-called-with-diff": "^2.0.0",
     "smalltalk": "^3.1.0",
     "socket.io-client": "^2.0.1",