diff --git a/moPepGen/__init__.py b/moPepGen/__init__.py
index fe28eba1..1faba5a4 100644
--- a/moPepGen/__init__.py
+++ b/moPepGen/__init__.py
@@ -5,7 +5,7 @@
 from typing import Iterable, IO
 
 
-__version__ = '1.2.0'
+__version__ = '1.2.1'
 
 ## Error messages
 ERROR_INDEX_IN_INTRON = 'The genomic index seems to be in an intron'
diff --git a/moPepGen/version.py b/moPepGen/version.py
index ca9b8772..71d16bdd 100644
--- a/moPepGen/version.py
+++ b/moPepGen/version.py
@@ -6,7 +6,7 @@
 from moPepGen import __version__
 
 
-MINIMAL_VERSION = '1.2.1'
+MINIMAL_VERSION = '1.1.0'
 
 class MetaVersion():
     """ Versions """