diff --git a/pom.xml b/pom.xml
index b5cf3984..8bc3ecbb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -52,6 +52,7 @@
     <license.copyrightOwners>Stefan Posch, Birgit Moeller and others.</license.copyrightOwners>
     <jython-shaded.version>2.7.0</jython-shaded.version>
     <jython-slim.version>2.7.2</jython-slim.version>
+    <postgresql.version>42.2.12</postgresql.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <trakem2-transform.version>1.0.1</trakem2-transform.version>
     <!-- MiToBo dependencies -->
@@ -406,8 +407,9 @@
       <artifactId>jfreechart</artifactId>
     </dependency>
     <dependency>
-      <groupId>postgresql</groupId>
+      <groupId>org.postgresql</groupId>
       <artifactId>postgresql</artifactId>
+      <version>${postgresql.version}</version>
     </dependency>
 
     <!-- Java 3D dependencies -->
diff --git a/src/main/java/de/unihalle/informatik/rhizoTrak/addon/RhizoIO.java b/src/main/java/de/unihalle/informatik/rhizoTrak/addon/RhizoIO.java
index a30e93ae..3bafb6c7 100644
--- a/src/main/java/de/unihalle/informatik/rhizoTrak/addon/RhizoIO.java
+++ b/src/main/java/de/unihalle/informatik/rhizoTrak/addon/RhizoIO.java
@@ -89,7 +89,6 @@
 import de.unihalle.informatik.rhizoTrak.display.Treeline;
 import de.unihalle.informatik.rhizoTrak.tree.ProjectThing;
 import de.unihalle.informatik.rhizoTrak.utils.Utils;
-import org.python.modules._systemrestart;
 
 public class RhizoIO {
 	public static final String RHIZOTRAK_PROJECTFILE_EXTENSION = "rtk";