diff --git a/docs/CHANGES/1.1.27-1.1.28.txt b/docs/CHANGES/1.1.27-1.1.28.txt
new file mode 100644
index 0000000..5ea0ddb
--- /dev/null
+++ b/docs/CHANGES/1.1.27-1.1.28.txt
@@ -0,0 +1 @@
+adding reading of Chianti v11 database.
diff --git a/pyneb/utils/pn_chianti.py b/pyneb/utils/pn_chianti.py
index 70e0c70..b5ac3cc 100644
--- a/pyneb/utils/pn_chianti.py
+++ b/pyneb/utils/pn_chianti.py
@@ -9,7 +9,7 @@
     from . import _chianti_tools_8 as _chianti_tools
 elif pn.config.Chianti_version_main == '7':
     from . import _chianti_tools
-elif pn.config.Chianti_version_main in ('9', '10'):
+elif pn.config.Chianti_version_main in ('9', '10', '11'):
     from . import _chianti_tools_9 as _chianti_tools
 from . import _chianti_constants as const
 from .physics import sym2name, vactoair
@@ -150,7 +150,7 @@ def Chianti_getOmega(ion_chianti, tem, lev1=None, lev2=None, Splups=None, NLevel
     pn.log_.debug('NLevels = {}'.format(NLevels), calling='Chianti_getOmega')
     temp=np.asarray(tem)
     if Splups is None:
-        if pn.config.Chianti_version_main in ('8', '9', '10'):
+        if pn.config.Chianti_version_main in ('8', '9', '10', '11'):
             Splups = _chianti_tools.scupsRead(ion_chianti)
         elif pn.config.Chianti_version_main == '7':
             Splups = _chianti_tools.splupsRead(ion_chianti)
@@ -187,7 +187,7 @@ def Chianti_getOmega(ion_chianti, tem, lev1=None, lev2=None, Splups=None, NLevel
                     isplups = isplups[0]
                 ttype=Splups["ttype"][isplups]
                 cups=Splups["cups"][isplups]
-                if pn.config.Chianti_version_main in ('8', '9', '10'):
+                if pn.config.Chianti_version_main in ('8', '9', '10', '11'):
                     nspl=Splups["ntemp"][isplups]
                     dx=1./(float(nspl)-1.)
                     xs = Splups['btemp'][isplups]
@@ -472,7 +472,7 @@ def __init__(self, elem=None, spec=None, atom=None, NLevels=None, TemArray=np.lo
         self._loadChianti()
         
     def _loadChianti(self):
-        if pn.config.Chianti_version_main in ('8', '9', '10'):
+        if pn.config.Chianti_version_main in ('8', '9', '10', '11'):
             self.fullFileName = _chianti_tools.ion2filename(self.ion_chianti) + '.scups'
         elif pn.config.Chianti_version_main == '7':
             self.fullFileName = _chianti_tools.ion2filename(self.ion_chianti) + '.splups'
@@ -484,7 +484,7 @@ def _loadChianti(self):
         
         self.Chianti_version = self.collPath.split('/')[-4]
         self.comments = {}
-        if pn.config.Chianti_version_main in ('8', '9', '10'):
+        if pn.config.Chianti_version_main in ('8', '9', '10', '11'):
             self.Splups = _chianti_tools.scupsRead(self.ion_chianti)
         elif pn.config.Chianti_version_main == '7':
             self.Splups = _chianti_tools.splupsRead(self.ion_chianti)
@@ -612,7 +612,7 @@ def getSources(self):
         sources = []
         sources.append('Omega-values from {0}'.format(self.Chianti_version))
         
-        if pn.config.Chianti_version_main in ('8', '9','10'):
+        if pn.config.Chianti_version_main in ('8', '9','10', '11'):
             refs = _chianti_tools.scupsRead(self.ion_chianti)
         elif pn.config.Chianti_version_main == '7':
             refs = _chianti_tools.splupsRead(self.ion_chianti)
diff --git a/pyproject.toml b/pyproject.toml
index 2c2cde9..8d0726b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pyneb"
-version = "1.1.27"
+version = "1.1.28"
 requires-python = ">= 3.8"
 dynamic = ["dependencies"]
 description = "A Python package for nebular analysis"