diff --git a/.github/workflows/codestyle.yml b/.github/workflows/codestyle.yml
index fd97d1fc5..a8b0e4b66 100644
--- a/.github/workflows/codestyle.yml
+++ b/.github/workflows/codestyle.yml
@@ -10,7 +10,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
-          python-version: "3.9"
+          python-version: "3.11"
       - name: Install pre-commit
         run: pip install pre-commit
       - name: Run pre-commit
diff --git a/.github/workflows/deployment.yml b/.github/workflows/deployment.yml
index d1bdb466d..50a8c7856 100644
--- a/.github/workflows/deployment.yml
+++ b/.github/workflows/deployment.yml
@@ -31,7 +31,7 @@ jobs:
           git clone https://github.com/DIRACGrid/DIRAC.git ../DIRAC
       - uses: actions/setup-python@v4
         with:
-          python-version: "3.9"
+          python-version: "3.11"
       - name: Installing dependencies
         run: |
           python -m pip install \
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index c5678b497..0ab2524d1 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -2,7 +2,7 @@
 # See https://pre-commit.com/hooks.html for more hooks
 
 default_language_version:
-  python: python3.9
+  python: python3.11
 
 exclude: |
   (?x)^(
@@ -19,12 +19,12 @@ repos:
       - id: check-added-large-files
 
   - repo: https://github.com/psf/black
-    rev: 23.1.0
+    rev: 23.7.0
     hooks:
       - id: black
 
   - repo: https://github.com/pre-commit/mirrors-prettier
-    rev: v3.0.0-alpha.4
+    rev: v3.0.1
     hooks:
       - id: prettier
         exclude: |
@@ -33,7 +33,7 @@ repos:
           )$
 
   - repo: https://github.com/pre-commit/mirrors-eslint
-    rev: v8.34.0
+    rev: v8.47.0
     hooks:
       - id: eslint
         additional_dependencies:
@@ -46,7 +46,7 @@ repos:
       - id: flynt
 
   - repo: https://github.com/asottile/pyupgrade
-    rev: v3.3.1
+    rev: v3.10.1
     hooks:
       - id: pyupgrade
-        args: ["--py39-plus"]
+        args: ["--py311-plus"]
diff --git a/environment.yml b/environment.yml
deleted file mode 100644
index 29cd8aabd..000000000
--- a/environment.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-name: dirac-web-development
-
-channels:
-  - conda-forge
-
-dependencies:
-  # runtime
-  - python =2.7
-  - pip
-  - certifi
-  # testing and development
-  - autopep8
-  - caniusepython3
-  - coverage
-  - hypothesis
-  - ipython
-  - mock
-  - parameterized
-  - pylint >=1.6.5
-  - pyparsing >=2.0.6
-  - pytest >=3.6
-  - pytest-cov >=2.2.0
-  - pytest-mock
-  - shellcheck
-  - diraccfg
-  # - readline >=6.2.4 in the standard library
-  - simplejson >=3.8.1
-  - tornado >=5.0.0,<6.0.0
-  - typing >=3.6.6
diff --git a/setup.cfg b/setup.cfg
index dbe3bea3c..a4266c067 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -15,6 +15,8 @@ classifiers =
     License :: OSI Approved :: GNU General Public License v3 (GPLv3)
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
     Topic :: Scientific/Engineering
     Topic :: System :: Distributed Computing
 
diff --git a/src/WebAppDIRAC/WebApp/static/core/css/css.css b/src/WebAppDIRAC/WebApp/static/core/css/css.css
index 1107a167a..4a3a5078b 100755
--- a/src/WebAppDIRAC/WebApp/static/core/css/css.css
+++ b/src/WebAppDIRAC/WebApp/static/core/css/css.css
@@ -23,7 +23,10 @@
 #app-dirac-loading .app-dirac-loading-indicator {
   background: none;
   color: #444;
-  font: bold 13px Helvetica, Arial, sans-serif;
+  font:
+    bold 13px Helvetica,
+    Arial,
+    sans-serif;
   height: auto;
   margin: 0;
   padding: 10px;
@@ -230,7 +233,11 @@
 }
 
 .ux-desktop-shortcut-text {
-  font: normal 10px tahoma, arial, verdana, sans-serif;
+  font:
+    normal 10px tahoma,
+    arial,
+    verdana,
+    sans-serif;
   text-decoration: none;
   padding-top: 5px;
   color: white;
diff --git a/src/WebAppDIRAC/WebApp/static/core/css/tabtheme.css b/src/WebAppDIRAC/WebApp/static/core/css/tabtheme.css
index 40e36e927..e1b0dcc15 100644
--- a/src/WebAppDIRAC/WebApp/static/core/css/tabtheme.css
+++ b/src/WebAppDIRAC/WebApp/static/core/css/tabtheme.css
@@ -59,7 +59,9 @@ pre {
 @font-face {
   font-family: "Pictos";
   src: url("../pictos/pictos.eot");
-  src: url("../pictos/pictos.eot?#iefix") format("embedded-opentype"), url("../pictos/pictos.woff") format("woff"),
+  src:
+    url("../pictos/pictos.eot?#iefix") format("embedded-opentype"),
+    url("../pictos/pictos.woff") format("woff"),
     url("../pictos/pictos.ttf") format("truetype");
   font-weight: normal;
   font-style: normal;
diff --git a/src/WebAppDIRAC/WebApp/static/core/js/utils/css/PlotView.css b/src/WebAppDIRAC/WebApp/static/core/js/utils/css/PlotView.css
index d2a4b852f..82220fed4 100644
--- a/src/WebAppDIRAC/WebApp/static/core/js/utils/css/PlotView.css
+++ b/src/WebAppDIRAC/WebApp/static/core/js/utils/css/PlotView.css
@@ -59,7 +59,10 @@
 
 #images-view .x-panel-body {
   background: white;
-  font: 11px Arial, Helvetica, sans-serif;
+  font:
+    11px Arial,
+    Helvetica,
+    sans-serif;
 }
 #images-view .thumb {
   background: #dddddd;