diff --git a/CHANGELOG b/CHANGELOG
index 3e183e3..2ecf801 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,12 @@
+4.7.4a1
+-------
+
+- Fix call signature for :py:func:`pepxml.read` and make it a full alias to :py:class:`pepxml.PepXML`.
+- Disable indexing of pepXML in :py:func:`pepxml.DataFrame`, which fixes creation of dataframes from files
+  with non-unique spectrum IDs.
+- Fix #156.
+
+
 4.7.3
 -----
 
diff --git a/pyteomics/version.py b/pyteomics/version.py
index bdcb997..3713d55 100644
--- a/pyteomics/version.py
+++ b/pyteomics/version.py
@@ -19,7 +19,7 @@
 
 """
 
-__version__ = '4.7.3'
+__version__ = '4.7.4a1'
 
 from collections import namedtuple
 import re