diff --git a/charmcraft.yaml b/charmcraft.yaml
index d7980afc..855e28b8 100644
--- a/charmcraft.yaml
+++ b/charmcraft.yaml
@@ -1,4 +1,4 @@
-# Copyright 2021 Canonical Ltd.
+# Copyright 2023 Canonical Ltd.
 # See LICENSE file for licensing details.
 
 type: charm
@@ -12,3 +12,6 @@ bases:
 parts:
   charm:
     charm-python-packages: [setuptools, pip]
+    # Install rustc and cargo as build packages because some charm's
+    # dependencies need this to be built and installed from source.
+    build-packages: [rustc, cargo]
diff --git a/config.yaml b/config.yaml
index dc239c9d..bc1b19ec 100644
--- a/config.yaml
+++ b/config.yaml
@@ -1,4 +1,4 @@
-# Copyright 2021 Canonical Ltd.
+# Copyright 2023 Canonical Ltd.
 # See LICENSE file for licensing details.
 
 options:
diff --git a/metadata.yaml b/metadata.yaml
index addedb16..9b51bb8c 100755
--- a/metadata.yaml
+++ b/metadata.yaml
@@ -1,4 +1,4 @@
-# Copyright 2021 Canonical Ltd.
+# Copyright 2023 Canonical Ltd.
 # See LICENSE file for licensing details.
 name: dex-auth
 summary: A federated OpenID Connect provider
diff --git a/requirements-fmt.txt b/requirements-fmt.txt
index 6e09e6ba..0cb547ab 100644
--- a/requirements-fmt.txt
+++ b/requirements-fmt.txt
@@ -2,14 +2,14 @@
 # This file is autogenerated by pip-compile with Python 3.8
 # by the following command:
 #
-#    pip-compile ./requirements-fmt.in
+#    pip-compile requirements-fmt.in
 #
 black==23.7.0
-    # via -r ./requirements-fmt.in
+    # via -r requirements-fmt.in
 click==8.1.6
     # via black
 isort==5.12.0
-    # via -r ./requirements-fmt.in
+    # via -r requirements-fmt.in
 mypy-extensions==1.0.0
     # via black
 packaging==23.1
diff --git a/requirements-integration.txt b/requirements-integration.txt
index d9a9fb62..a2ad37d4 100644
--- a/requirements-integration.txt
+++ b/requirements-integration.txt
@@ -2,10 +2,10 @@
 # This file is autogenerated by pip-compile with Python 3.8
 # by the following command:
 #
-#    pip-compile ./requirements-integration.in
+#    pip-compile requirements-integration.in
 #
 aiohttp==3.8.5
-    # via -r ./requirements-integration.in
+    # via -r requirements-integration.in
 aiosignal==1.3.1
     # via aiohttp
 anyio==3.7.1
@@ -29,7 +29,7 @@ brotli==1.0.9
     # via selenium-wire
 cachetools==5.3.1
     # via google-auth
-certifi==2023.5.7
+certifi==2023.7.22
     # via
     #   httpcore
     #   httpx
@@ -100,11 +100,11 @@ jedi==0.18.2
     # via ipython
 jinja2==3.1.2
     # via
-    #   -r ./requirements-integration.in
+    #   -r requirements-integration.in
     #   pytest-operator
 juju==2.9.44.0
     # via
-    #   -r ./requirements-integration.in
+    #   -r requirements-integration.in
     #   pytest-operator
 jujubundlelib==0.5.7
     # via theblues
@@ -113,7 +113,7 @@ kaitaistruct==0.10
 kubernetes==27.2.0
     # via juju
 lightkube==0.14.0
-    # via -r ./requirements-integration.in
+    # via -r requirements-integration.in
 lightkube-models==1.27.1.4
     # via lightkube
 macaroonbakery==1.3.1
@@ -194,14 +194,14 @@ pytest==7.4.0
 pytest-asyncio==0.21.1
     # via pytest-operator
 pytest-operator==0.28.0
-    # via -r ./requirements-integration.in
+    # via -r requirements-integration.in
 python-dateutil==2.8.2
     # via kubernetes
 pytz==2023.3
     # via pyrfc3339
 pyyaml==6.0.1
     # via
-    #   -r ./requirements-integration.in
+    #   -r requirements-integration.in
     #   juju
     #   jujubundlelib
     #   kubernetes
@@ -209,7 +209,7 @@ pyyaml==6.0.1
     #   pytest-operator
 requests==2.31.0
     # via
-    #   -r ./requirements-integration.in
+    #   -r requirements-integration.in
     #   kubernetes
     #   macaroonbakery
     #   requests-oauthlib
@@ -220,10 +220,10 @@ rsa==4.9
     # via google-auth
 selenium==4.10.0
     # via
-    #   -r ./requirements-integration.in
+    #   -r requirements-integration.in
     #   selenium-wire
 selenium-wire==5.1.0
-    # via -r ./requirements-integration.in
+    # via -r requirements-integration.in
 six==1.16.0
     # via
     #   asttokens
@@ -244,7 +244,7 @@ sortedcontainers==2.4.0
 stack-data==0.6.2
     # via ipython
 tenacity==8.2.2
-    # via -r ./requirements-integration.in
+    # via -r requirements-integration.in
 theblues==0.5.2
     # via juju
 tomli==2.0.1
diff --git a/requirements-lint.txt b/requirements-lint.txt
index d1814e06..ab9acc9b 100644
--- a/requirements-lint.txt
+++ b/requirements-lint.txt
@@ -2,26 +2,26 @@
 # This file is autogenerated by pip-compile with Python 3.8
 # by the following command:
 #
-#    pip-compile ./requirements-lint.in
+#    pip-compile requirements-lint.in
 #
 black==23.7.0
-    # via -r ./requirements-lint.in
+    # via -r requirements-lint.in
 click==8.1.6
     # via black
 codespell==2.2.5
-    # via -r ./requirements-lint.in
+    # via -r requirements-lint.in
 flake8==6.0.0
     # via
-    #   -r ./requirements-lint.in
+    #   -r requirements-lint.in
     #   flake8-builtins
     #   pep8-naming
     #   pyproject-flake8
 flake8-builtins==2.1.0
-    # via -r ./requirements-lint.in
+    # via -r requirements-lint.in
 flake8-copyright==0.2.4
-    # via -r ./requirements-lint.in
+    # via -r requirements-lint.in
 isort==5.12.0
-    # via -r ./requirements-lint.in
+    # via -r requirements-lint.in
 mccabe==0.7.0
     # via flake8
 mypy-extensions==1.0.0
@@ -31,7 +31,7 @@ packaging==23.1
 pathspec==0.11.1
     # via black
 pep8-naming==0.13.3
-    # via -r ./requirements-lint.in
+    # via -r requirements-lint.in
 platformdirs==3.9.1
     # via black
 pycodestyle==2.10.0
@@ -39,7 +39,7 @@ pycodestyle==2.10.0
 pyflakes==3.0.1
     # via flake8
 pyproject-flake8==6.0.0.post1
-    # via -r ./requirements-lint.in
+    # via -r requirements-lint.in
 tomli==2.0.1
     # via
     #   black
diff --git a/requirements-unit.in b/requirements-unit.in
index 3faaf62a..f3cd6a7a 100644
--- a/requirements-unit.in
+++ b/requirements-unit.in
@@ -1,12 +1,7 @@
-bcrypt
-charmed-kubeflow-chisme
+# Copyright 2023 Canonical Ltd.
+# See LICENSE file for licensing details.
 coverage
-# Workaround for https://github.com/python-jsonschema/jsonschema/issues/1117
-# and https://github.com/python-jsonschema/jsonschema/issues/1114
-jsonschema<4.18
 ops
 pytest
-pytest-mock
-pytest-lazy-fixture
 pyyaml
-serialized-data-interface
+-r requirements.txt
diff --git a/requirements-unit.txt b/requirements-unit.txt
index 41994b2f..d9f58696 100644
--- a/requirements-unit.txt
+++ b/requirements-unit.txt
@@ -2,108 +2,151 @@
 # This file is autogenerated by pip-compile with Python 3.8
 # by the following command:
 #
-#    pip-compile ./requirements-unit.in
+#    pip-compile requirements-unit.in
 #
 anyio==3.7.1
-    # via httpcore
+    # via
+    #   -r requirements.txt
+    #   httpcore
 attrs==23.1.0
-    # via jsonschema
+    # via
+    #   -r requirements.txt
+    #   jsonschema
 bcrypt==4.0.1
-    # via -r ./requirements-unit.in
-certifi==2023.5.7
+    # via -r requirements.txt
+certifi==2023.7.22
     # via
+    #   -r requirements.txt
     #   httpcore
     #   httpx
     #   requests
 charmed-kubeflow-chisme==0.0.11
-    # via -r ./requirements-unit.in
+    # via -r requirements.txt
 charset-normalizer==3.2.0
-    # via requests
+    # via
+    #   -r requirements.txt
+    #   requests
 coverage==7.2.7
-    # via -r ./requirements-unit.in
+    # via -r requirements-unit.in
 deepdiff==6.2.1
-    # via charmed-kubeflow-chisme
+    # via
+    #   -r requirements.txt
+    #   charmed-kubeflow-chisme
 exceptiongroup==1.1.2
     # via
+    #   -r requirements.txt
     #   anyio
     #   pytest
 h11==0.14.0
-    # via httpcore
+    # via
+    #   -r requirements.txt
+    #   httpcore
 httpcore==0.17.3
-    # via httpx
+    # via
+    #   -r requirements.txt
+    #   httpx
 httpx==0.24.1
-    # via lightkube
+    # via
+    #   -r requirements.txt
+    #   lightkube
 idna==3.4
     # via
+    #   -r requirements.txt
     #   anyio
     #   httpx
     #   requests
 importlib-resources==6.0.0
-    # via jsonschema
+    # via
+    #   -r requirements.txt
+    #   jsonschema
 iniconfig==2.0.0
     # via pytest
 jinja2==3.1.2
-    # via charmed-kubeflow-chisme
+    # via
+    #   -r requirements.txt
+    #   charmed-kubeflow-chisme
 jsonschema==4.17.3
     # via
-    #   -r ./requirements-unit.in
+    #   -r requirements.txt
     #   serialized-data-interface
 lightkube==0.14.0
-    # via charmed-kubeflow-chisme
+    # via
+    #   -r requirements.txt
+    #   charmed-kubeflow-chisme
 lightkube-models==1.27.1.4
-    # via lightkube
+    # via
+    #   -r requirements.txt
+    #   lightkube
 markupsafe==2.1.3
-    # via jinja2
+    # via
+    #   -r requirements.txt
+    #   jinja2
 ops==2.4.1
     # via
-    #   -r ./requirements-unit.in
+    #   -r requirements-unit.in
+    #   -r requirements.txt
     #   charmed-kubeflow-chisme
     #   serialized-data-interface
 ordered-set==4.1.0
-    # via deepdiff
+    # via
+    #   -r requirements.txt
+    #   deepdiff
 packaging==23.1
     # via pytest
 pkgutil-resolve-name==1.3.10
-    # via jsonschema
+    # via
+    #   -r requirements.txt
+    #   jsonschema
 pluggy==1.2.0
     # via pytest
 pyrsistent==0.19.3
-    # via jsonschema
-pytest==7.4.0
     # via
-    #   -r ./requirements-unit.in
-    #   pytest-lazy-fixture
-    #   pytest-mock
-pytest-lazy-fixture==0.6.3
-    # via -r ./requirements-unit.in
-pytest-mock==3.11.1
-    # via -r ./requirements-unit.in
+    #   -r requirements.txt
+    #   jsonschema
+pytest==7.4.0
+    # via -r requirements-unit.in
 pyyaml==6.0.1
     # via
-    #   -r ./requirements-unit.in
+    #   -r requirements-unit.in
+    #   -r requirements.txt
     #   lightkube
     #   ops
     #   serialized-data-interface
 requests==2.31.0
-    # via serialized-data-interface
+    # via
+    #   -r requirements.txt
+    #   serialized-data-interface
 ruamel-yaml==0.17.32
-    # via charmed-kubeflow-chisme
+    # via
+    #   -r requirements.txt
+    #   charmed-kubeflow-chisme
 ruamel-yaml-clib==0.2.7
-    # via ruamel-yaml
-serialized-data-interface==0.6.0
-    # via -r ./requirements-unit.in
+    # via
+    #   -r requirements.txt
+    #   ruamel-yaml
+serialized-data-interface==0.7.0
+    # via -r requirements.txt
 sniffio==1.3.0
     # via
+    #   -r requirements.txt
     #   anyio
     #   httpcore
     #   httpx
 tenacity==8.2.2
-    # via charmed-kubeflow-chisme
+    # via
+    #   -r requirements.txt
+    #   charmed-kubeflow-chisme
 tomli==2.0.1
     # via pytest
 urllib3==2.0.4
-    # via requests
+    # via
+    #   -r requirements.txt
+    #   requests
 websocket-client==1.6.1
-    # via ops
+    # via
+    #   -r requirements.txt
+    #   ops
 zipp==3.16.2
-    # via importlib-resources
+    # via
+    #   -r requirements.txt
+    #   importlib-resources
diff --git a/requirements.in b/requirements.in
index e1691642..037e1074 100644
--- a/requirements.in
+++ b/requirements.in
@@ -1,10 +1,8 @@
-# Copyright 2021 Canonical Ltd.
+# Copyright 2023 Canonical Ltd.
 # See LICENSE file for licensing details.
+bcrypt
 charmed-kubeflow-chisme
 jinja2
-# Workaround for https://github.com/python-jsonschema/jsonschema/issues/1117
-# and https://github.com/python-jsonschema/jsonschema/issues/1114
-jsonschema<4.18
 lightkube
-ops<2
+ops
 serialized-data-interface
diff --git a/requirements.txt b/requirements.txt
index 1ffe7f7c..20f3b40a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,19 +2,21 @@
 # This file is autogenerated by pip-compile with Python 3.8
 # by the following command:
 #
-#    pip-compile ./requirements.in
+#    pip-compile requirements.in
 #
 anyio==3.7.1
     # via httpcore
 attrs==23.1.0
     # via jsonschema
-certifi==2023.5.7
+bcrypt==4.0.1
+    # via -r requirements.in
+certifi==2023.7.22
     # via
     #   httpcore
     #   httpx
     #   requests
 charmed-kubeflow-chisme==0.0.11
-    # via -r ./requirements.in
+    # via -r requirements.in
 charset-normalizer==3.2.0
     # via requests
 deepdiff==6.2.1
@@ -36,23 +38,21 @@ importlib-resources==6.0.0
     # via jsonschema
 jinja2==3.1.2
     # via
-    #   -r ./requirements.in
+    #   -r requirements.in
     #   charmed-kubeflow-chisme
 jsonschema==4.17.3
-    # via
-    #   -r ./requirements.in
-    #   serialized-data-interface
+    # via serialized-data-interface
 lightkube==0.14.0
     # via
-    #   -r ./requirements.in
+    #   -r requirements.in
     #   charmed-kubeflow-chisme
 lightkube-models==1.27.1.4
     # via lightkube
 markupsafe==2.1.3
     # via jinja2
-ops==1.5.5
+ops==2.4.1
     # via
-    #   -r ./requirements.in
+    #   -r requirements.in
     #   charmed-kubeflow-chisme
     #   serialized-data-interface
 ordered-set==4.1.0
@@ -72,8 +72,8 @@ ruamel-yaml==0.17.32
     # via charmed-kubeflow-chisme
 ruamel-yaml-clib==0.2.7
     # via ruamel-yaml
-serialized-data-interface==0.6.0
-    # via -r ./requirements.in
+serialized-data-interface==0.7.0
+    # via -r requirements.in
 sniffio==1.3.0
     # via
     #   anyio
@@ -83,5 +83,7 @@ tenacity==8.2.2
     # via charmed-kubeflow-chisme
 urllib3==2.0.4
     # via requests
+websocket-client==1.6.1
+    # via ops
 zipp==3.16.2
     # via importlib-resources
diff --git a/src/charm.py b/src/charm.py
index 754667d7..55f167b3 100755
--- a/src/charm.py
+++ b/src/charm.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright 2021 Canonical Ltd.
+# Copyright 2023 Canonical Ltd.
 # See LICENSE file for licensing details.
 
 import logging
diff --git a/tests/integration/test_charm.py b/tests/integration/test_charm.py
index f15bf181..2af91634 100644
--- a/tests/integration/test_charm.py
+++ b/tests/integration/test_charm.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Canonical Ltd.
+# Copyright 2023 Canonical Ltd.
 # See LICENSE file for licensing details.
 
 import json
diff --git a/tests/integration/test_upgrade_charm.py b/tests/integration/test_upgrade_charm.py
index e78c136c..48dbea37 100644
--- a/tests/integration/test_upgrade_charm.py
+++ b/tests/integration/test_upgrade_charm.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Canonical Ltd.
+# Copyright 2023 Canonical Ltd.
 # See LICENSE file for licensing details.
 
 import logging
diff --git a/tests/unit/test_charm.py b/tests/unit/test_charm.py
index 47ffcb4f..7a511cee 100644
--- a/tests/unit/test_charm.py
+++ b/tests/unit/test_charm.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Canonical Ltd.
+# Copyright 2023 Canonical Ltd.
 # See LICENSE file for licensing details.
 
 from unittest.mock import patch
diff --git a/tox.ini b/tox.ini
index fd9eec76..73509eaa 100644
--- a/tox.ini
+++ b/tox.ini
@@ -31,9 +31,11 @@ allowlist_externals =
     find
     pip-compile
     xargs
-commands = 
-; uses 'bash -c' because piping didn't work in regular tox commands
-  bash -c 'find . -type f -name "requirements*.in" | xargs --replace=\{\} pip-compile --resolver=backtracking \{\}'
+commands =
+    ; we must preserve the order of compilation, since each *.in file depends on some *.txt file.
+    ; For example, requirements-unit.in depends on requirements.txt and we must compile first
+    ; requirements.txt to ensure that requirements-unit.txt get the same dependency as the requirements.txt
+    bash -c 'for pattern in "requirements.in" "requirements-fmt.in" "requirements*.in"; do find . -type f -name "$pattern" -exec bash -c "cd \$(dirname "{}") && pip-compile --resolver=backtracking \$(basename "{}")" \;; done'
 deps =
     pip-tools
 description = Update requirements files by executing pip-compile on all requirements*.in files, including those in subdirs.