diff --git a/package.json b/package.json
index 8b9b1bde85..b142cb2315 100644
--- a/package.json
+++ b/package.json
@@ -64,7 +64,7 @@
     "mocha-phantomjs-core": "^1.3.0",
     "mustache": "2.2.1",
     "phantomjs-prebuilt": "2.1.12",
-    "proj4": "2.3.14",
+    "proj4": "2.3.15",
     "resemblejs": "2.2.1",
     "serve-files": "1.0.0",
     "sinon": "1.17.5",