diff --git a/forms/README.md b/forms/README.md
index 6edc3ab9..69b7a9d7 100644
--- a/forms/README.md
+++ b/forms/README.md
@@ -59,13 +59,12 @@ This module is packaged as a fat jar. For testing purposes, the default configur
  You can run the forms module just as any module of dg-toolkit:
 
 
- `java -Dspring.profiles.active=dev -jar target/forms-0.0.1-SNAPSHOT.jar --illegal-access=warn`
+`java @argfile.txt -Dspring.profiles.active=dev -jar target/forms-0.0.1-SNAPSHOT.jar`
 
  This will start everything, including an embedded Tomcat Web server and all the services attached it.
 
-`--illegal-access=warn` is needed in JDK 16 until other dependencies are migrated.
-Use `--illegal-access=permit` to keep the logs clear from such warnings.
-See [#364](https://github.com/devgateway/dg-toolkit/issues/364).
+`@argfile.txt` stores additional VM arguments, in particular to grant reflective access to
+specific modules for other modules. Use `@$MODULE_DIR$/src/main/resources/argfile.txt` in IDE.
 
 # Using Spring Boot Developer Tools
 
diff --git a/forms/src/main/resources/argfile.txt b/forms/src/main/resources/argfile.txt
new file mode 100644
index 00000000..3480a840
--- /dev/null
+++ b/forms/src/main/resources/argfile.txt
@@ -0,0 +1,4 @@
+--add-opens java.naming/javax.naming=ALL-UNNAMED
+--add-opens java.base/java.lang.reflect=ALL-UNNAMED
+--add-opens java.base/java.lang.ref=ALL-UNNAMED
+--add-opens java.base/java.lang=ALL-UNNAMED
diff --git a/pom.xml b/pom.xml
index 58b0a252..af881e76 100644
--- a/pom.xml
+++ b/pom.xml
@@ -212,8 +212,8 @@
                     <artifactId>maven-compiler-plugin</artifactId>
                     <version>${maven-compiler-plugin.version}</version>
                     <configuration>
-                        <source>16</source>
-                        <target>16</target>
+                        <source>${java.version}</source>
+                        <target>${java.version}</target>
                     </configuration>
                 </plugin>
             </plugins>
diff --git a/web/README.md b/web/README.md
index ead31193..af5be5d3 100644
--- a/web/README.md
+++ b/web/README.md
@@ -13,11 +13,10 @@ The web module is part of its larger dg-toolkit parent build, so you need to bui
 
 Because it gets packaged as a fat jar, starting it is piece of cake:
 
-`java -jar target/web-0.0.1-SNAPSHOT.jar --illegal-access=warn`
+`java @argfile.txt -jar target/web-0.0.1-SNAPSHOT.jar`
 
-`--illegal-access=warn` is needed in JDK 16 until other dependencies are migrated.
-Use `--illegal-access=permit` to keep the logs clear from such warnings.
-See [#364](https://github.com/devgateway/dg-toolkit/issues/364).
+`@argfile.txt` stores additional VM arguments, in particular to grant reflective access to
+specific modules for other modules.
 
 This will start everything, including an embedded Tomcat Web server and all the services attached it.