diff --git a/README.md b/README.md
index 5549bda2a..89f0371d5 100755
--- a/README.md
+++ b/README.md
@@ -20,21 +20,36 @@ Cryptographic operations in CyberChef should not be relied upon to provide secur
 
 [A live demo can be found here][1] - have fun!
 
-## Containers
+## Running Locally with Docker
 
-If you would like to try out CyberChef locally you can either build it yourself:
+**Prerequisites**
 
+- [Docker](hhttps://www.docker.com/products/docker-desktop/)
+  - Docker Desktop must be open and running on your machine
+
+
+#### Option 1: Build the Docker Image Yourself
+
+1. Build the docker image
 ```bash
 docker build --tag cyberchef --ulimit nofile=10000 .
+```
+2. Run the docker container
+```bash
 docker run -it -p 8080:80 cyberchef
 ```
+3. Navigate to `http://localhost:8080` in your browser
 
-Or you can use our image directly:
+#### Option 2: Use the pre-built Docker Image
+
+If you prefer to skip the build process, you can use the pre-built image
 
 ```bash
 docker run -it -p 8080:80 ghcr.io/gchq/cyberchef:latest
 ```
 
+Just like before, navigate to `http://localhost:8080` in your browser.
+
 This image is built and published through our [GitHub Workflows](.github/workflows/releases.yml)
 
 ## How it works
diff --git a/src/core/operations/ShowOnMap.mjs b/src/core/operations/ShowOnMap.mjs
index c2ac1c6e3..d75c2aa6a 100644
--- a/src/core/operations/ShowOnMap.mjs
+++ b/src/core/operations/ShowOnMap.mjs
@@ -1,6 +1,7 @@
 /**
  * @author j433866 [j433866@gmail.com]
- * @copyright Crown Copyright 2019
+ * @author 0xff1ce [github.com/0xff1ce]
+ * @copyright Crown Copyright 2024
  * @license Apache-2.0
  */
 
@@ -22,7 +23,7 @@ class ShowOnMap extends Operation {
         this.name = "Show on map";
         this.module = "Hashing";
         this.description = "Displays co-ordinates on a slippy map.<br><br>Co-ordinates will be converted to decimal degrees before being shown on the map.<br><br>Supported formats:<ul><li>Degrees Minutes Seconds (DMS)</li><li>Degrees Decimal Minutes (DDM)</li><li>Decimal Degrees (DD)</li><li>Geohash</li><li>Military Grid Reference System (MGRS)</li><li>Ordnance Survey National Grid (OSNG)</li><li>Universal Transverse Mercator (UTM)</li></ul><br>This operation will not work offline.";
-        this.infoURL = "https://foundation.wikimedia.org/wiki/Maps_Terms_of_Use";
+        this.infoURL = "https://osmfoundation.org/wiki/Terms_of_Use";
         this.inputType = "string";
         this.outputType = "string";
         this.presentType = "html";
@@ -85,10 +86,10 @@ class ShowOnMap extends Operation {
             data = "0, 0";
         }
         const zoomLevel = args[0];
-        const tileUrl = "https://maps.wikimedia.org/osm-intl/{z}/{x}/{y}.png",
-            tileAttribution = "<a href=\"https://wikimediafoundation.org/wiki/Maps_Terms_of_Use\">Wikimedia maps</a> | &copy; <a href=\"https://www.openstreetmap.org/copyright\">OpenStreetMap</a> contributors",
-            leafletUrl = "https://unpkg.com/leaflet@1.5.0/dist/leaflet.js",
-            leafletCssUrl = "https://unpkg.com/leaflet@1.5.0/dist/leaflet.css";
+        const tileUrl = "https://tile.openstreetmap.org/{z}/{x}/{y}.png",
+            tileAttribution = "&copy; <a href=\"https://www.openstreetmap.org/copyright\">OpenStreetMap</a> contributors",
+            leafletUrl = "https://unpkg.com/leaflet@1.9.4/dist/leaflet.js",
+            leafletCssUrl = "https://unpkg.com/leaflet@1.9.4/dist/leaflet.css";
         return `<link rel="stylesheet" href="${leafletCssUrl}" crossorigin=""/>
 <style>
     #output-text .cm-content,
diff --git a/src/core/operations/ToDecimal.mjs b/src/core/operations/ToDecimal.mjs
index 65798a7cb..50db41f68 100644
--- a/src/core/operations/ToDecimal.mjs
+++ b/src/core/operations/ToDecimal.mjs
@@ -45,11 +45,12 @@ class ToDecimal extends Operation {
      * @returns {string}
      */
     run(input, args) {
-        input = new Uint8Array(input);
         const delim = Utils.charRep(args[0]),
             signed = args[1];
         if (signed) {
-            input = input.map(v => v > 0x7F ? v - 0xFF - 1 : v);
+            input = new Int8Array(input);
+        } else {
+            input = new Uint8Array(input);
         }
         return input.join(delim);
     }
diff --git a/src/core/operations/VarIntDecode.mjs b/src/core/operations/VarIntDecode.mjs
index 46c99cb71..b73eb5b36 100644
--- a/src/core/operations/VarIntDecode.mjs
+++ b/src/core/operations/VarIntDecode.mjs
@@ -24,7 +24,7 @@ class VarIntDecode extends Operation {
         this.description = "Decodes a VarInt encoded integer. VarInt is an efficient way of encoding variable length integers and is commonly used with Protobuf.";
         this.infoURL = "https://developers.google.com/protocol-buffers/docs/encoding#varints";
         this.inputType = "byteArray";
-        this.outputType = "number";
+        this.outputType = "string";
         this.args = [];
     }
 
@@ -35,7 +35,18 @@ class VarIntDecode extends Operation {
      */
     run(input, args) {
         try {
-            return Protobuf.varIntDecode(input);
+            if (typeof BigInt === "function") {
+                let result = BigInt(0);
+                let offset = BigInt(0);
+                for (let i = 0; i < input.length; i++) {
+                    result |= BigInt(input[i] & 0x7f) << offset;
+                    if (!(input[i] & 0x80)) break;
+                    offset += BigInt(7);
+                }
+                return result.toString();
+            } else {
+                return Protobuf.varIntDecode(input).toString();
+            }
         } catch (err) {
             throw new OperationError(err);
         }
diff --git a/src/core/operations/VarIntEncode.mjs b/src/core/operations/VarIntEncode.mjs
index d86d33f58..8e5a6ef0e 100644
--- a/src/core/operations/VarIntEncode.mjs
+++ b/src/core/operations/VarIntEncode.mjs
@@ -23,19 +23,31 @@ class VarIntEncode extends Operation {
         this.module = "Default";
         this.description = "Encodes a Vn integer as a VarInt. VarInt is an efficient way of encoding variable length integers and is commonly used with Protobuf.";
         this.infoURL = "https://developers.google.com/protocol-buffers/docs/encoding#varints";
-        this.inputType = "number";
+        this.inputType = "string";
         this.outputType = "byteArray";
         this.args = [];
     }
 
     /**
-     * @param {number} input
+     * @param {string} input
      * @param {Object[]} args
      * @returns {byteArray}
      */
     run(input, args) {
         try {
-            return Protobuf.varIntEncode(input);
+            if (typeof BigInt === "function") {
+                let value = BigInt(input);
+                if (value < 0) throw new OperationError("Negative values cannot be represented as VarInt");
+                const result = [];
+                while (value >= 0x80) {
+                    result.push(Number(value & BigInt(0x7f)) | 0x80);
+                    value >>= BigInt(7);
+                }
+                result.push(Number(value));
+                return result;
+            } else {
+                return Protobuf.varIntEncode(Number(input));
+            }
         } catch (err) {
             throw new OperationError(err);
         }