diff --git a/package-overrides/github/timdown/rangy-release@1.2.3.json b/package-overrides/github/timdown/rangy-release@1.2.3.json
new file mode 100644
index 0000000..321273a
--- /dev/null
+++ b/package-overrides/github/timdown/rangy-release@1.2.3.json
@@ -0,0 +1,19 @@
+{
+  "format": "global",
+  "main": "rangy-core",
+
+  "shim": {
+    "rangy-core": {
+      "exports": "rangy"
+    },
+    "rangy-cssclassapplier": {
+      "deps": ["rangy"]
+    },
+    "rangy-selectionsaverestore": {
+      "deps": ["rangy"]
+    },
+    "rangy-serializer": {
+      "deps": ["rangy"]
+    }
+  }
+}
diff --git a/registry.json b/registry.json
index 6cd527c..5dcb48e 100644
--- a/registry.json
+++ b/registry.json
@@ -195,6 +195,7 @@
   "raphael": "github:DmitryBaranovskiy/raphael",
   "ratchet": "github:maker/ratchet",
   "raven-js": "github:getsentry/raven-js",
+  "rangy": "github:timdown/rangy-release",
   "react": "npm:react",
   "react-router": "npm:react-router",
   "readline": "github:jspm/nodelibs-readline",