diff --git a/Changelog.md b/Changelog.md
index d461544..bb5a0fd 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## v0.5.2 - 1st March 2019
+ - [API] Added `version` action
+
 ## v0.5.1 - 26th February 2019
  - Fixed issue with non-linear sensor reading reports ([#15](https://github.com/ConnectedHumber/Air-Quality-Web/issues/15))
 
diff --git a/README.md b/README.md
index a7b0531..157ed3f 100644
--- a/README.md
+++ b/README.md
@@ -80,6 +80,18 @@ Instead, enter your configuration details into `data/settings.toml`, which overr
 ## API
 The server-side API is accessed through `api.php`, and supports a number of GET parameters. The most important of these is the `action` parameter, Which determines what the API will do. The following values are supported:
 
+### version
+> Returns the version of the application.
+
+_No parameters are currently supported by this action._
+
+Examples:
+
+```
+https://example.com/path/to/api.php?action=version
+```
+
+
 ### fetch-data
 > Fetches air quality data from the system for a specific data type at a specific date and time.
 
diff --git a/logic/Actions/Version.php b/logic/Actions/Version.php
new file mode 100644
index 0000000..d256df5
--- /dev/null
+++ b/logic/Actions/Version.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace AirQuality\Actions;
+
+use \SBRL\TomlConfig;
+
+use \AirQuality\PerfFormatter;
+
+class Version implements IAction {
+	/** @var TomlConfig */
+	private $settings;
+	
+	
+	public function __construct(
+		TomlConfig $in_settings) {
+		$this->settings = $in_settings;
+	}
+	
+	public function handle() : bool {
+		global $start_time;
+		
+		$start_handle = microtime(true);
+		
+		
+		// 1: Parse markdown
+		$result = file_get_contents(ROOT_DIR."version");
+		
+		
+		// 2: Send response
+		header("content-length: " . strlen($result));
+		header("content-type: text/plain");
+		header("x-time-taken: " . PerfFormatter::format_perf_data($start_time, $start_handle, null));
+		echo($result);
+		return true;
+	}
+}
diff --git a/version b/version
index 992ac75..b0c2058 100644
--- a/version
+++ b/version
@@ -1 +1 @@
-v0.5.1
+v0.5.2