diff --git a/package.json b/package.json
index 74660957..32f70716 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
     "eslint-plugin-react": "^7.0.1",
     "flow-bin": "^0.46.0",
     "glob": "^7.1.1",
+    "image-size": "^0.5.1",
     "istanbul-api": "^1.1.0",
     "istanbul-lib-coverage": "^1.0.0",
     "jest": "^19.0.2",
diff --git a/yarn.lock b/yarn.lock
index d40f6eda..6202fcc7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1937,6 +1937,10 @@ ignore@^3.2.0:
   version "3.3.3"
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-3.3.3.tgz#432352e57accd87ab3110e82d3fea0e47812156d"
 
+image-size@^0.5.1:
+  version "0.5.5"
+  resolved "https://registry.yarnpkg.com/image-size/-/image-size-0.5.5.tgz#09dfd4ab9d20e29eb1c3e80b8990378df9e3cb9c"
+
 imurmurhash@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/imurmurhash/-/imurmurhash-0.1.4.tgz#9218b9b2b928a238b13dc4fb6b6d576f231453ea"