diff --git a/packages/ripple-address-codec/HISTORY.md b/packages/ripple-address-codec/HISTORY.md
index 13aa7eb4..aa0a5cae 100644
--- a/packages/ripple-address-codec/HISTORY.md
+++ b/packages/ripple-address-codec/HISTORY.md
@@ -1,6 +1,6 @@
 # ripple-address-codec Release History
 
-## 4.0.0 (UNRELEASED)
+## 4.0.0 (2019-10-08)
 
 ### Breaking Changes
 
@@ -14,3 +14,4 @@
 * `xAddressToClassicAddress` - Decode an X-address to account ID, tag, and network ID
 * `decodeXAddress` - Convert X-address to classic address, tag, and network ID
 * `isValidXAddress` - Check whether an X-address (X...) is valid
+
diff --git a/packages/ripple-address-codec/package.json b/packages/ripple-address-codec/package.json
index b473ef65..7d553843 100644
--- a/packages/ripple-address-codec/package.json
+++ b/packages/ripple-address-codec/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ripple-address-codec",
-  "version": "4.0.0-b6",
+  "version": "4.0.0",
   "description": "encodes/decodes base58 encoded XRP Ledger identifiers",
   "files": [
     "dist/*",