diff --git a/src/main/scala/solving/SolverMulti.scala b/src/main/scala/solving/SolverMulti.scala
index 0481143..5090113 100644
--- a/src/main/scala/solving/SolverMulti.scala
+++ b/src/main/scala/solving/SolverMulti.scala
@@ -1,7 +1,7 @@
 /**
   * diff-SAT
   *
-  * Copyright (c) 2018-2020 Matthias Nickles
+  * Copyright (c) 2018-2021 Matthias Nickles
   *
   * matthiasDOTnicklesATgmxDOTnet
   *