diff --git a/README.md b/README.md
index 1973807..a6e2f91 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,11 @@ This project is the main Comunic RestAPI. It assures data backend support.
 (c) Pierre HUBERT since 2017
 
 # Crons required for Comunic
-Currently, this server does not make use of crons.
+
+## Calls cron
+There is a cron to automatically cleanup old conversation. Ideally this cron should be executed every 30 seconds. The file to execute is `bin/clean_calls` 
+
+
 
 # Use calls in Comunic
 To use calls in Comunic, you need a WebRTCSignalExchangerServer, a small signal exchanging server written using NodeJS. You also need to modify your configuration file located at `config/overwrite.php` by copying and pasting commented configuration located at `config/calls.php` and make it fit your needs.
diff --git a/bin/clean_calls b/bin/clean_calls
new file mode 100755
index 0000000..ea0a4c0
--- /dev/null
+++ b/bin/clean_calls
@@ -0,0 +1,18 @@
+#!/usr/bin/env php
+
+############################
+# ComunicAPI calls cleaner #
+#                          #
+#  @author Pierre HUBERT   #
+############################
+
+Automatically remove old calls
+
+<?php
+
+require __DIR__."/../init.php";
+
+if(!components()->calls->cleanCalls())
+	echo "Could not clean calls!";
+
+echo "Calls successfully cleaned.";
\ No newline at end of file
diff --git a/classes/components/CallsComponent.php b/classes/components/CallsComponent.php
index 084ac8f..b78b9eb 100644
--- a/classes/components/CallsComponent.php
+++ b/classes/components/CallsComponent.php
@@ -304,6 +304,47 @@ class CallsComponents {
 		return true;
 	}
 
+	/**
+	 * Delete all old call
+	 * 
+	 * @return bool TRUE for a success / FALSE else
+	 */
+	public function cleanCalls() : bool {
+
+		//Compute timeout time
+		$old_time = time() - cs()->config->get("calls_expiration");
+		
+		//Get the list of old calls
+		$calls = db()->select(
+			self::CALLS_LIST_TABLE,
+			"WHERE last_active < ?",
+			array($old_time),
+			array("id")
+		);
+
+		//Process each result
+		foreach($calls as $call){
+
+			//Delete all the members of the call
+			db()->deleteEntry(
+				self::CALLS_MEMBERS_TABLE,
+				"call_id = ?",
+				array($call["id"])
+			);
+
+		}
+
+		//Delete calls entries
+		db()->deleteEntry(
+			self::CALLS_LIST_TABLE,
+			"last_active < ?",
+			array($old_time)
+		);
+
+		//Success
+		return true;
+	}
+
 	/**
 	 * Turn a database entry into a CallInformation object
 	 * 
diff --git a/config/calls.php b/config/calls.php
index 6cf065b..1c4726c 100644
--- a/config/calls.php
+++ b/config/calls.php
@@ -26,4 +26,12 @@ $config->set("calls", array(
 	"turn_username" => "anonymous",
 	"turn_password" => "anonymous"
 ));
-*/
\ No newline at end of file
+*/
+
+/**
+ * Calls expiration time
+ * 
+ * The amount of time of inactivity for what the call get
+ * automatically deleted
+ */
+$config->set("calls_expiration", 30);
\ No newline at end of file