diff --git a/CHANGELOG.md b/CHANGELOG.md
index 62fd651..c5e7c62 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 - Added optional override for the filename in `Api::createAttachment` by [@betterphp]
 - Allow getting issue count back from `Walker` class by [@aik099].
 - Setup `.gitattributes` for better `CHANGELOG.md` merging by [@glensc].
+- Added `Api::addWorklog` and `Api::deleteWorklog` calls for more control over the work logs [@dumconstantin] and [@aik099].
 
 ### Changed
 - Classes/interfaces were renamed to use namespaces by [@chobie].
@@ -71,3 +72,4 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 [@aik099]: https://github.com/aik099
 [@betterphp]: https://github.com/betterphp
 [@glensc]: https://github.com/glensc
+[@dumconstantin]: https://github.com/dumconstantin
diff --git a/src/Jira/Api.php b/src/Jira/Api.php
index 8bf3cee..1426710 100644
--- a/src/Jira/Api.php
+++ b/src/Jira/Api.php
@@ -38,6 +38,7 @@ class Api
 	const REQUEST_DELETE = 'DELETE';
 
 	const AUTOMAP_FIELDS = 0x01;
+	const DATE_TIME_FORMAT = 'Y-m-d\TG:m:s.vO';
 
 	/**
 	 * Endpoint URL.
@@ -373,6 +374,33 @@ public function addComment($issue_key, $params)
 		return $this->api(self::REQUEST_POST, sprintf('/rest/api/2/issue/%s/comment', $issue_key), $params);
 	}
 
+	/**
+	 * Adds a worklog for an issue.
+	 *
+	 * @param string         $issue_key  Issue key should be "YOURPROJ-22".
+	 * @param string|integer $time_spent Either string in "2w 4d 6h 45m" format or second count as a number.
+	 * @param array          $params     Params.
+	 *
+	 * @return array
+	 * @since  2.0.0
+	 */
+	public function addWorklog($issue_key, $time_spent, array $params = array())
+	{
+		if ( is_int($time_spent) ) {
+			$params['timeSpentSeconds'] = $time_spent;
+		}
+		else {
+			$params['timeSpent'] = $time_spent;
+		}
+
+		return $this->api(
+			self::REQUEST_POST,
+			sprintf('/rest/api/2/issue/%s/worklog', $issue_key),
+			$params,
+			true
+		);
+	}
+
 	/**
 	 * Get all worklogs for an issue.
 	 *
@@ -387,6 +415,26 @@ public function getWorklogs($issue_key, array $params)
 		return $this->api(self::REQUEST_GET, sprintf('/rest/api/2/issue/%s/worklog', $issue_key), $params);
 	}
 
+	/**
+	 * Deletes an issue worklog.
+	 *
+	 * @param string  $issue_key  Issue key should be "YOURPROJ-22".
+	 * @param integer $worklog_id Work Log ID.
+	 * @param array   $params     Params.
+	 *
+	 * @return array
+	 * @since  2.0.0
+	 */
+	public function deleteWorklog($issue_key, $worklog_id, array $params = array())
+	{
+		return $this->api(
+			self::REQUEST_DELETE,
+			sprintf('/rest/api/2/issue/%s/worklog/%s', $issue_key, $worklog_id),
+			$params,
+			true
+		);
+	}
+
 	/**
 	 * Get available transitions for a ticket.
 	 *
diff --git a/tests/Jira/ApiTest.php b/tests/Jira/ApiTest.php
index 31c69a4..caed679 100644
--- a/tests/Jira/ApiTest.php
+++ b/tests/Jira/ApiTest.php
@@ -312,6 +312,86 @@ public function testGetIssueTypes()
 		$this->assertEquals($expected, $actual);
 	}
 
+	/**
+	 * @param string|integer $time_spent           Time spent.
+	 * @param array          $expected_rest_params Expected rest params.
+	 *
+	 * @return void
+	 * @dataProvider addWorkLogWithoutCustomParamsDataProvider
+	 */
+	public function testAddWorkLogWithoutCustomParams($time_spent, array $expected_rest_params)
+	{
+		$response = '{}';
+
+		$this->expectClientCall(
+			Api::REQUEST_POST,
+			'/rest/api/2/issue/JRA-15/worklog',
+			$expected_rest_params,
+			$response
+		);
+
+		$actual = $this->api->addWorklog('JRA-15', $time_spent);
+
+		$this->assertEquals(json_decode($response, true), $actual, 'The response is json-decoded.');
+	}
+
+	public static function addWorkLogWithoutCustomParamsDataProvider()
+	{
+		return array(
+			'integer time spent' => array(12, array('timeSpentSeconds' => 12)),
+			'string time spent' => array('12m', array('timeSpent' => '12m')),
+		);
+	}
+
+	public function testAddWorklogWithCustomParams()
+	{
+		$response = '{}';
+
+		$started = date(Api::DATE_TIME_FORMAT, 1621026000);
+		$this->expectClientCall(
+			Api::REQUEST_POST,
+			'/rest/api/2/issue/JRA-15/worklog',
+			array('timeSpent' => '12m', 'started' => $started),
+			$response
+		);
+
+		$actual = $this->api->addWorklog('JRA-15', '12m', array('started' => $started));
+
+		$this->assertEquals(json_decode($response, true), $actual, 'The response is json-decoded.');
+	}
+
+	public function testDeleteWorkLogWithoutCustomParams()
+	{
+		$response = '{}';
+
+		$this->expectClientCall(
+			Api::REQUEST_DELETE,
+			'/rest/api/2/issue/JRA-15/worklog/11256',
+			array(),
+			$response
+		);
+
+		$actual = $this->api->deleteWorklog('JRA-15', 11256);
+
+		$this->assertEquals(json_decode($response, true), $actual, 'The response is json-decoded.');
+	}
+
+	public function testDeleteWorkLogWithCustomParams()
+	{
+		$response = '{}';
+
+		$this->expectClientCall(
+			Api::REQUEST_DELETE,
+			'/rest/api/2/issue/JRA-15/worklog/11256',
+			array('custom' => 'param'),
+			$response
+		);
+
+		$actual = $this->api->deleteWorklog('JRA-15', 11256, array('custom' => 'param'));
+
+		$this->assertEquals(json_decode($response, true), $actual, 'The response is json-decoded.');
+	}
+
 	/**
 	 * Expects a particular client call.
 	 *