diff --git a/configure.ac b/configure.ac
index 647b9c0da8e54000fd2e1f6753dae39c7cea9ef6..0e3f304ce727d231c05ba673d7057d87e3bb8d6a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 dnl Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.69])
-AC_INIT([rock],[2.0])
+AC_INIT([rock],[2.1])
 
 
 AC_CANONICAL_TARGET
diff --git a/src/ROCKparams.cpp b/src/ROCKparams.cpp
index 79f0ed99d97566dacae01e798ba62422d3b7e43b..42733b9c71317e0c483bbcdfed716e0eaad6f876 100755
--- a/src/ROCKparams.cpp
+++ b/src/ROCKparams.cpp
@@ -41,7 +41,7 @@ const int ROCKparams::undef_ext;
 
 void usage(int status) {
 	cout<<endl;
-	cout<<"ROCK 2.0                    Copyright (C) 2016-2022 Institut Pasteur"<<endl;
+	cout<<"ROCK 2.1                    Copyright (C) 2016-2022 Institut Pasteur"<<endl;
 	cout<<endl;
 	cout<<"Reducing Over-Covering K-mers within FASTQ file(s)"<<endl;
 	cout<<endl;