diff --git a/src/DIRAC/Core/Base/Client.py b/src/DIRAC/Core/Base/Client.py
index 5fa4e4ba2bb..b3fd1da4e96 100644
--- a/src/DIRAC/Core/Base/Client.py
+++ b/src/DIRAC/Core/Base/Client.py
@@ -9,6 +9,7 @@
 __RCSID__ = "$Id$"
 
 import ast
+import sys
 from functools import partial
 
 try:
@@ -22,7 +23,13 @@ def __get__(self, instance, owner):
             return partial(self.func, instance, *(self.args or ()), **(self.keywords or {}))
 
 
-import importlib_resources
+from importlib_resources import files
+
+if sys.version_info.major > 3:
+    from importlib_resources import as_file  # pylint: disable=no-member
+else:
+    from importlib_resources import path as as_file
+
 import six
 
 from DIRAC.Core.Tornado.Client.ClientSelector import RPCClientSelector
@@ -167,9 +174,8 @@ def addFunctions(clientCls):
         attrDict = dict(clientCls.__dict__)
         for extension in extensionsByPriority():
             try:
-                path = importlib_resources.path(
-                    "%s.%sSystem.Service" % (extension, systemName),
-                    "%s.py" % handlerModuleName,
+                path = as_file(
+                    files("%s.%sSystem.Service" % (extension, systemName)).joinpath("%s.py" % handlerModuleName)
                 )
                 fullHandlerClassPath = "%s.%s" % (extension, handlerClassPath)
                 with path as fp:
diff --git a/src/DIRAC/Core/Utilities/Graphs/QualityMapGraph.py b/src/DIRAC/Core/Utilities/Graphs/QualityMapGraph.py
index 809b33f119e..17011d2f854 100644
--- a/src/DIRAC/Core/Utilities/Graphs/QualityMapGraph.py
+++ b/src/DIRAC/Core/Utilities/Graphs/QualityMapGraph.py
@@ -8,6 +8,7 @@
 from __future__ import print_function
 
 import datetime
+import sys
 from pylab import setp
 from matplotlib.colors import Normalize
 import matplotlib.cm as cm
@@ -181,7 +182,10 @@ def draw(self):
         cb = ColorbarBase(
             cax, cmap=self.cmap, norm=self.norms, boundaries=self.cbBoundaries, values=self.cbValues, ticks=self.cbTicks
         )
-        cb.draw_all()
+        if sys.version_info.major < 3:
+            cb.draw_all()  # pylint: disable=no-member
+        else:
+            self.figure.draw_without_rendering()
         # cb = self.ax.colorbar( self.mapper, format="%d%%",
         #  orientation='horizontal', fraction=0.04, pad=0.1, aspect=40  )
         # setp( cb.outline, linewidth=.5 )
diff --git a/src/DIRAC/FrameworkSystem/Client/ComponentInstaller.py b/src/DIRAC/FrameworkSystem/Client/ComponentInstaller.py
index 4208aa35140..83542596521 100644
--- a/src/DIRAC/FrameworkSystem/Client/ComponentInstaller.py
+++ b/src/DIRAC/FrameworkSystem/Client/ComponentInstaller.py
@@ -72,10 +72,11 @@
 import re
 import shutil
 import stat
+import sys
 import time
 from collections import defaultdict
+from importlib_resources import files
 
-import importlib_resources
 import six
 import subprocess32 as subprocess
 from diraccfg import CFG
@@ -845,7 +846,7 @@ def getComponentCfg(
             for ext in extensions:
                 cfgTemplateModule = "%s.%sSystem" % (ext, system)
                 try:
-                    cfgTemplate = importlib_resources.read_text(cfgTemplateModule, "ConfigTemplate.cfg")
+                    cfgTemplate = files(cfgTemplateModule).joinpath("ConfigTemplate.cfg").read_text(encoding="utf-8")
                 except (ImportError, OSError):
                     continue
                 gLogger.notice("Loading configuration template from", cfgTemplateModule)
@@ -2195,7 +2196,7 @@ def installDatabase(self, dbName):
         systemName = databases[filename]
         moduleName = ".".join([extension, systemName, "DB"])
         gLogger.debug("Installing %s from %s" % (filename, moduleName))
-        dbSql = importlib_resources.read_text(moduleName, filename)
+        dbSql = files(moduleName).joinpath(filename).read_text(encoding="utf-8")
 
         # just check
         result = self.execMySQL("SHOW STATUS")
@@ -2295,7 +2296,7 @@ def _createMySQLCMDLines(self, dbSql):
                 sourcedDBbFileName = line.split(" ")[1].replace("\n", "")
                 gLogger.info("Found file to source: %s" % sourcedDBbFileName)
                 module, filename = sourcedDBbFileName.rsplit("/", 1)
-                dbSourced = importlib_resources.read_text(module.replace("/", "."), filename)
+                dbSourced = files(module.replace("/", ".")).joinpath(filename).read_text(encoding="utf-8")
                 for lineSourced in dbSourced.split("\n"):
                     if lineSourced.strip():
                         cmdLines.append(lineSourced.strip())