diff --git a/History.md b/History.md
index 5cac4e54..ea10b7c5 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,6 @@
+- OX Schema incompat is now type 10
+- Upgrade to PDFBox 2.0.23 #233
+
 2.2.0
 =======
 2021-05-20
diff --git a/doc/development_documentation.md b/doc/development_documentation.md
index 6dc8c7a9..c3fcee4e 100644
--- a/doc/development_documentation.md
+++ b/doc/development_documentation.md
@@ -170,7 +170,7 @@ Change to the project directory and run
   * `mvn javadoc:javadoc`. If that works you can 
   * clean the release with `mvn release:clean` and prepare the release with
   * `mvn release:prepare  -DignoreSnapshots=true` and enter the version numbers. 
-  * After that is through you can create a new release via `mvn release:perform -Dmaven.java.skip=True`.This will also update the maven repo. 
+  * After that is through you can create a new release via `mvn release:perform`.This will also update the maven repo. 
   
   ![screenshot](development_documentation_screenshot_release.png "Screenshot Release")
   
diff --git a/library/pom.xml b/library/pom.xml
index 4a8398b1..517f687a 100644
--- a/library/pom.xml
+++ b/library/pom.xml
@@ -67,12 +67,12 @@
 		<dependency>
 			<groupId>org.apache.pdfbox</groupId>
 			<artifactId>preflight</artifactId>
-			<version>[2.0.15,2.0.17]</version>
+			<version>2.0.23</version>
 		</dependency>
 		<dependency>
 			<groupId>org.apache.pdfbox</groupId>
 			<artifactId>pdfbox</artifactId>
-			<version>[2.0.15,2.0.17]</version>
+			<version>2.0.23</version>
 		</dependency>
 		<dependency>
 			<groupId>org.dom4j</groupId>