diff --git a/package.json b/package.json
index 70d08c1..937a08e 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "css-mqpacker": "^5.0.1",
     "custom-event-polyfill": "^0.3.0",
     "del": "^2.2.2",
-    "ecstatic": "^2.1.0",
+    "ecstatic": "^2.2.2",
     "eslint": "^3.16.0",
     "fastclick": "^1.0.6",
     "flow-bin": "^0.41.0",
diff --git a/yarn.lock b/yarn.lock
index 46836af..7dcc738 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1843,14 +1843,14 @@ ecc-jsbn@~0.1.1:
   dependencies:
     jsbn "~0.1.0"
 
-ecstatic@^2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/ecstatic/-/ecstatic-2.1.0.tgz#477a4a6b25cecb112f697dbd2c7fa354154ea6be"
+ecstatic@^2.2.2:
+  version "2.2.2"
+  resolved "https://registry.yarnpkg.com/ecstatic/-/ecstatic-2.2.2.tgz#1c7969b7a8893a04852e9373edeeb1d62809d393"
   dependencies:
-    he "^0.5.0"
+    he "^1.1.1"
     mime "^1.2.11"
     minimist "^1.1.0"
-    url-join "^1.0.0"
+    url-join "^2.0.2"
 
 electron-to-chromium@^1.2.3:
   version "1.2.4"
@@ -3036,9 +3036,9 @@ he@1.1.x:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/he/-/he-1.1.1.tgz#93410fd21b009735151f8868c2f271f3427e23fd"
 
-he@^0.5.0:
-  version "0.5.0"
-  resolved "https://registry.yarnpkg.com/he/-/he-0.5.0.tgz#2c05ffaef90b68e860f3fd2b54ef580989277ee2"
+he@^1.1.1:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/he/-/he-1.2.0.tgz#84ae65fa7eafb165fddb61566ae14baf05664f0f"
 
 hmac-drbg@^1.0.0:
   version "1.0.0"
@@ -6399,9 +6399,9 @@ urix@^0.1.0, urix@~0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/urix/-/urix-0.1.0.tgz#da937f7a62e21fec1fd18d49b35c2935067a6c72"
 
-url-join@^1.0.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/url-join/-/url-join-1.1.0.tgz#741c6c2f4596c4830d6718460920d0c92202dc78"
+url-join@^2.0.2:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/url-join/-/url-join-2.0.5.tgz#5af22f18c052a000a48d7b82c5e9c2e2feeda728"
 
 "url2@>=2.0.0 <3.0.0":
   version "2.0.0"