diff --git a/CHANGELOG.md b/CHANGELOG.md
index 686df000..e4f7dc1c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,9 @@
 # Changelog
 All notable changes to CyberChef will be documented in this file.
 
+### [8.4.0] - 2018-08-23
+- 'To Base85' and 'From Base85' operations added [@PenguinGeorge] | [#340]
+
 ### [8.3.0] - 2018-08-21
 - 'To MessagePack' and 'From MessagePack' operations added [@artemisbot] | [#338]
 
@@ -38,6 +41,7 @@ All notable changes to CyberChef will be documented in this file.
 -  Initial open source commit [@n1474335] | [b1d73a72](https://github.com/gchq/CyberChef/commit/b1d73a725dc7ab9fb7eb789296efd2b7e4b08306)
 
 
+[8.4.0]: https://github.com/gchq/CyberChef/releases/tag/v8.4.0
 [8.3.0]: https://github.com/gchq/CyberChef/releases/tag/v8.3.0
 [8.2.0]: https://github.com/gchq/CyberChef/releases/tag/v8.2.0
 [8.1.0]: https://github.com/gchq/CyberChef/releases/tag/v8.1.0
@@ -69,3 +73,4 @@ All notable changes to CyberChef will be documented in this file.
 [#311]: https://github.com/gchq/CyberChef/pull/311
 [#325]: https://github.com/gchq/CyberChef/pull/325
 [#338]: https://github.com/gchq/CyberChef/pull/338
+[#340]: https://github.com/gchq/CyberChef/pull/340
diff --git a/package-lock.json b/package-lock.json
index 8887a801..5a2ebd10 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4197,14 +4197,12 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
-          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -4219,20 +4217,17 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -4349,8 +4344,7 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "ini": {
           "version": "1.3.5",
@@ -4362,7 +4356,6 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
-          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -4377,7 +4370,6 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
-          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -4489,8 +4481,7 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -4623,7 +4614,6 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
-          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",