diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ebf4bbb2..5b1199add 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,11 +17,14 @@ All notable changes to this project will be documented in this file.
 - Notify users about card assignments
 - Add shortcut to assign a card to yourself
 - Improved view for printing
+- Support for Nextcloud 15
 
 ### Fixed
 
 - Accesibility improvements
 - Don't allow empty card titles
+- Improved checkbox handling in markdown
+
 
 ## 0.4.0 - 2018-07-11
 
diff --git a/appinfo/info.xml b/appinfo/info.xml
index 5a958dbbb..2cc15b471 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -17,7 +17,7 @@
 - 🚀 Get your project organized
 
 </description>
-    <version>0.5.0-beta1</version>
+    <version>0.5.0-rc1</version>
     <licence>agpl</licence>
     <author>Julius Härtl</author>
     <namespace>Deck</namespace>
@@ -32,6 +32,10 @@
     <screenshot>https://download.bitgrid.net/nextcloud/deck/screenshots/Deck_Board.png</screenshot>
     <screenshot>https://download.bitgrid.net/nextcloud/deck/screenshots/Deck_Details.png</screenshot>
     <dependencies>
+        <php min-version="5.6"/>
+        <database min-version="9.4">pgsql</database>
+        <database>sqlite</database>
+        <database min-version="5.5">mysql</database>
         <nextcloud min-version="13" max-version="15" />
     </dependencies>
     <background-jobs>
diff --git a/krankerl.toml b/krankerl.toml
index 3d36507c2..a5e4fa631 100644
--- a/krankerl.toml
+++ b/krankerl.toml
@@ -15,6 +15,7 @@ exclude = [
     "js/Gruntfile.js",
     "js/package.json",
     "js/package-lock.json",
+    "docs/",
     "tests",
     ".codecov.yml",
     "composer.json",
@@ -28,6 +29,7 @@ exclude = [
     "issue_template.md",
     "krankerl.toml",
     "Makefile",
+    "mkdocs.yml",
     "run-eslint.sh"
 ]
 
diff --git a/lib/Activity/DeckProvider.php b/lib/Activity/DeckProvider.php
index 887211ed8..2667b20e3 100644
--- a/lib/Activity/DeckProvider.php
+++ b/lib/Activity/DeckProvider.php
@@ -142,7 +142,11 @@ class DeckProvider implements IProvider {
 		$placeholders = $replacements = [];
 		foreach ($parameters as $placeholder => $parameter) {
 			$placeholders[] = '{' . $placeholder . '}';
-			$replacements[] = $parameter['name'];
+			if (is_array($parameter) && array_key_exists('name', $parameter)) {
+				$replacements[] = $parameter['name'];
+			} else {
+				$replacements[] = '';
+			}
 		}
 
 		$event->setParsedSubject(str_replace($placeholders, $replacements, $subject))
diff --git a/lib/Service/BoardService.php b/lib/Service/BoardService.php
index c2bbcb04a..3eba4ece6 100644
--- a/lib/Service/BoardService.php
+++ b/lib/Service/BoardService.php
@@ -88,7 +88,7 @@ class BoardService {
 	/**
 	 * @return array
 	 */
-	public function findAll($since = 0) {
+	public function findAll($since = -1) {
 		$userInfo = $this->getBoardPrerequisites();
 		$userBoards = $this->boardMapper->findAllByUser($userInfo['user'], null, null, $since);
 		$groupBoards = $this->boardMapper->findAllByGroups($userInfo['user'], $userInfo['groups'],null, null,  $since);
diff --git a/lib/Service/StackService.php b/lib/Service/StackService.php
index c9cc04f21..2e6b27e47 100644
--- a/lib/Service/StackService.php
+++ b/lib/Service/StackService.php
@@ -127,7 +127,7 @@ class StackService {
 	 * @throws \OCA\Deck\NoPermissionException
 	 * @throws BadRequestException
 	 */
-	public function findAll($boardId, $since = 0) {
+	public function findAll($boardId, $since = -1) {
 		if (is_numeric($boardId) === false) {
 			throw new BadRequestException('boardId must be a number');
 		}