diff --git a/assignments/nbproject/project.properties b/assignments/nbproject/project.properties
index 8bf756cc93c147ade5f8a0e9322e3612222d1495..8423aa450053a37e372c3f6f2c9c2f5dd69ed33d 100644
--- a/assignments/nbproject/project.properties
+++ b/assignments/nbproject/project.properties
@@ -70,8 +70,8 @@ javac.modulepath=
 javac.processormodulepath=
 javac.processorpath=\
     ${javac.classpath}
-javac.source=22
-javac.target=22
+javac.source=20
+javac.target=20
 javac.test.classpath=\
     ${javac.classpath}:\
     ${build.classes.dir}