diff --git a/pom.xml b/pom.xml
index f2aa8c1ddfeaa98952d64d2b559312cdcba83b80..6f042b62468a7c3adb10efe59fcc4f55ab57749e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,8 +7,8 @@
 	<packaging>war</packaging>
 
 	<properties>
-		<io.spring.platform-version>Brussels-SR11</io.spring.platform-version>
-		<io.netty-version>4.1.26.Final</io.netty-version>
+		<io.spring.platform-version>Brussels-SR12</io.spring.platform-version>
+		<io.netty-version>4.1.28.Final</io.netty-version>
 		<org.aspectj-version>1.8.13</org.aspectj-version>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<timestamp>${maven.build.timestamp}</timestamp>
@@ -334,7 +334,7 @@
 		<dependency>
 			<groupId>org.checkerframework</groupId>
 			<artifactId>checker-qual</artifactId>
-			<version>2.5.3</version>
+			<version>2.5.4</version>
 		</dependency>
 	</dependencies>
 
diff --git a/src/site/markdown/index.md b/src/site/markdown/index.md
index 2a20606d9650708a959ae6240d3e804cd8ddb12c..2b771513d1739d86b8ca695f11331d5fbe3480ba 100644
--- a/src/site/markdown/index.md
+++ b/src/site/markdown/index.md
@@ -1,4 +1,4 @@
-# Indroduction
+# Introduction
 
 ARSnova is a modern approach to Audience Response Systems (ARS).
 It is released under the GPLv3 license, and is offered as a Software as a Service free of charge.