diff --git a/.java-version b/.java-version
new file mode 100644
index 0000000..b6a7d89
--- /dev/null
+++ b/.java-version
@@ -0,0 +1 @@
+16
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index da9702f..ffed3a2 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.8-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/scripts/includeLearningObjectives.gradle b/scripts/includeLearningObjectives.gradle
index 76f8e23..e072584 100644
--- a/scripts/includeLearningObjectives.gradle
+++ b/scripts/includeLearningObjectives.gradle
@@ -6,12 +6,11 @@ class LearningObjective {
     int chapter
     int chapterIndex
 
-
     LearningObjective(String id, String title, String chapter, String chapterIndex) {
-      this.id = id
-      this.title = title
-      this.chapter = Integer.valueOf(chapter)
-      this.chapterIndex = Integer.valueOf(chapterIndex)
+        this.id = id
+        this.title = title
+        this.chapter = Integer.valueOf(chapter)
+        this.chapterIndex = Integer.valueOf(chapterIndex)
     }
 }
 
@@ -19,10 +18,6 @@ task includeLearningObjectives(
         description: 'collect learning objectives from source files and include them as listing',
         group: 'isaqb-curriculum'
 ) {
-    doFirst {
-        buildDir.mkdirs()
-    }
-
     doLast {
         def contentDE = createLearningObjectivesContent("DE", ~/\[\[(LZ-\d*-\d*)\]\]\s*==== (LZ (\d*)-(\d*).*)/, "Verzeichnis der Lernziele")
         def contentEN = createLearningObjectivesContent("EN", ~/\[\[(LG-\d*-\d*)\]\]\s*==== (LG (\d*)-(\d*).*)/, "List of Learning Goals")
@@ -41,63 +36,66 @@ task includeLearningObjectives(
     ext.collectLearningObjectives = { pattern ->
         def docsFolder = new File(projectDir, '/docs')
         def learningObjectives = []
+
         docsFolder.traverse(type: FILES) { file ->
-            if(file.name ==~ '.*[.](ad|adoc|asciidoc)$') {
+
+            if (file.name ==~ '.*[.](ad|adoc|asciidoc)$') {
                 def content = file.text
                 def matcher = content =~ pattern
 
-                while(matcher) {
-                    def id = matcher.group(1)
-                    def title = matcher.group(2)
-                    def chapter = matcher.group(3)
-                    def chapterIndex = matcher.group(4)
-                    learningObjectives.add(
-                        new LearningObjective(id, title, chapter, chapterIndex))
+                for (result in matcher.results()) {
+
+                    def id = result.group(1)
+                    def title = result.group(2)
+                    def chapter = result.group(3)
+                    def chapterIndex = result.group(4)
+                    learningObjectives.add(new LearningObjective(id, title, chapter, chapterIndex))
                 }
             }
         }
 
         return learningObjectives
     }
+}
 
-    ext.sortLearningObjectives =  { learningObjectives ->
-        learningObjectives.sort { a, b ->
-            if(a.chapter == b.chapter) {
-                a.chapterIndex <=> b.chapterIndex
-            } else {
-                a.chapter <=> b.chapter
-            }
+ext.sortLearningObjectives = { learningObjectives ->
+    learningObjectives.sort { a, b ->
+        if (a.chapter == b.chapter) {
+            a.chapterIndex <=> b.chapterIndex
+        } else {
+            a.chapter <=> b.chapter
         }
     }
+}
 
-    ext.compileLearningObjectives = { language, headline, learningObjectives ->
-        def content = ''<<''
+ext.compileLearningObjectives = { language, headline, learningObjectives ->
+    def content = '' << ''
 
-        content <<= "// tag::" + language + "[]\n"
-        content <<= "== " + headline + "\n\n"
+    content <<= "// tag::" + language + "[]\n"
+    content <<= "== " + headline + "\n\n"
 
-        learningObjectives.each { learningObjective ->
-            content <<= "- <<" + learningObjective.id + ", " + learningObjective.title + ">>\n"
-        }
+    learningObjectives.each { learningObjective ->
+        content <<= "- <<" + learningObjective.id + ", " + learningObjective.title + ">>\n"
+    }
 
-        content <<= "// end::" + language + "[]\n"
+    content <<= "// end::" + language + "[]\n"
 
-        return content.toString()
-    }
+    return content.toString()
+}
 
-    ext.writeLearningObjectives = { contentDE, contentEN ->
-        def docsFolder = new File(projectDir, '/docs')
-        def outFile = new File(docsFolder, '/learning-objectives.adoc')
+ext.writeLearningObjectives = { contentDE, contentEN ->
+    def docsFolder = new File(projectDir, '/docs')
+    def outFile = new File(docsFolder, '/learning-objectives.adoc')
 
-        println "Learning objectives file: " + outFile.getAbsolutePath()
+    println "Learning objectives file: " + outFile.getAbsolutePath()
 
-        final String EMPTYRemark = """// tag::REMARK[]\n// end::REMARK[]\n"""
+    final String EMPTYRemark = """// tag::REMARK[]\n// end::REMARK[]\n"""
 
-        outFile.withWriter('UTF-8') { writer ->
-            writer.writeLine("// this is autogenerated - please do not modify manually!\n")
-            writer.writeLine(contentDE)
-            writer.writeLine(contentEN)
-            writer.writeLine(EMPTYRemark)
-        }
+    outFile.withWriter('UTF-8') { writer ->
+        writer.writeLine("// this is autogenerated - please do not modify manually!\n")
+        writer.writeLine(contentDE)
+        writer.writeLine(contentEN)
+        writer.writeLine(EMPTYRemark)
     }
 }
+