diff --git a/package.json b/package.json
index d49941d..26b0b3c 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "rollup-plugin-commonjs": "^9.1.6",
     "rollup-plugin-node-builtins": "^2.1.2",
     "rollup-plugin-typescript2": "^0.17.0",
-    "systemjs": "^0.21.4",
+    "systemjs": "^0.21.6",
     "typescript": "^3.0.1"
   }
 }