diff --git a/jbi/jira/client.py b/jbi/jira/client.py
index 8de7efef..607c11b8 100644
--- a/jbi/jira/client.py
+++ b/jbi/jira/client.py
@@ -1,5 +1,5 @@
 import logging
-from typing import Collection, Iterable, Optional
+from typing import Any, Collection, Iterable, Optional, Union
 
 import requests
 from atlassian import Jira
@@ -84,7 +84,7 @@ def paginated_projects(
         expand=None,
         url=None,
         keys: Optional[Collection[str]] = None,
-    ):
+    ) -> dict:
         """Returns a paginated list of projects visible to the user.
 
         https://developer.atlassian.com/cloud/jira/platform/rest/v2/api-group-projects/#api-rest-api-2-project-search-get
@@ -97,20 +97,23 @@ def paginated_projects(
                 "``projects_from_cloud`` method is only available for Jira Cloud platform"
             )
 
-        params = []
+        params_dict: dict[str, Any] = {}
 
         if keys is not None:
             if len(keys) > 50:
                 raise ValueError("Up to 50 project keys can be provided.")
-            params = [("keys", key) for key in keys]
+            params_dict["keys"] = list(keys)
 
         if included_archived:
-            params.append(("includeArchived", included_archived))
+            params_dict["includeArchived"] = included_archived
         if expand:
-            params.append(("expand", expand))
+            params_dict["expand"] = expand
         page_url = url or self.resource_url("project/search")
         is_url_absolute = bool(page_url.lower().startswith("http"))
-        return self.get(page_url, params=params, absolute=is_url_absolute)
+        projects: Union[dict, None] = self.get(
+            page_url, params=params_dict, absolute=is_url_absolute
+        )
+        return projects if projects else {"values": []}
 
     @instrumented_method
     def permitted_projects(self, permissions: Optional[Iterable] = None) -> list[dict]:
@@ -125,5 +128,5 @@ def permitted_projects(self, permissions: Optional[Iterable] = None) -> list[dic
             "/rest/api/2/permissions/project",
             json={"permissions": list(permissions)},
         )
-        projects: list[dict] = response["projects"]
+        projects: list[dict] = response["projects"] if response else []
         return projects
diff --git a/jbi/jira/service.py b/jbi/jira/service.py
index be133d68..6654cd93 100644
--- a/jbi/jira/service.py
+++ b/jbi/jira/service.py
@@ -522,7 +522,7 @@ def check_jira_all_project_issue_types_exist(self, actions):
 
         try:
             paginated_project_response = self.client.paginated_projects(
-                expand="issueTypes", keys=actions.configured_jira_projects_keys
+                expand="issueTypes", keys=sorted(actions.configured_jira_projects_keys)
             )
         except requests.RequestException:
             return [
diff --git a/poetry.lock b/poetry.lock
index 3465a442..ea6f6b08 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -50,14 +50,14 @@ tests = ["mypy (>=0.800)", "pytest", "pytest-asyncio"]
 
 [[package]]
 name = "atlassian-python-api"
-version = "3.41.21"
+version = "4.0.3"
 description = "Python Atlassian REST API Wrapper"
 optional = false
 python-versions = "*"
 groups = ["main"]
 files = [
-    {file = "atlassian_python_api-3.41.21-py3-none-any.whl", hash = "sha256:6397bfa08d19acf08a766d3db5dd782348e8a3efca49cbf4ada870290a7fcf07"},
-    {file = "atlassian_python_api-3.41.21.tar.gz", hash = "sha256:30117504ebdcbe229c6a15f7a6b89076e7f20e5feeb425fbce2b4b0b18b0e639"},
+    {file = "atlassian_python_api-4.0.3-py3-none-any.whl", hash = "sha256:23d9f0d33af260bbe7cec7edde125ce40b370183da7bf2f1c012ff5cfe721fa0"},
+    {file = "atlassian_python_api-4.0.3.tar.gz", hash = "sha256:c5347e15c5a0a2ce987767c3428d112680fb5c4228f2f309009d9b01b5bea22e"},
 ]
 
 [package.dependencies]
@@ -68,6 +68,7 @@ oauthlib = "*"
 requests = "*"
 requests_oauthlib = "*"
 six = "*"
+typing-extensions = "*"
 
 [package.extras]
 kerberos = ["requests-kerberos"]
@@ -2198,4 +2199,4 @@ dev = ["doc8", "flake8", "flake8-import-order", "rstcheck[sphinx]", "sphinx"]
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.12, <3.14"
-content-hash = "a51972eac1bbb26bac17804883becf799f7a234a0a28c7ff9734d240da66befc"
+content-hash = "fe6ffed9c9abdcd97e661283ce95984bc5f14f4e445244a9fb0fc0c12b82e073"
diff --git a/pyproject.toml b/pyproject.toml
index 1fb47e6c..5aa9cb06 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ python = ">=3.12, <3.14"
 fastapi = "^0.115.12"
 pydantic = {version = "^2.11.3", extras = ["email"]}
 uvicorn = {extras = ["standard"], version = "^0.34.2"}
-atlassian-python-api = "^3.41.21"
+atlassian-python-api = "^4.0.3"
 dockerflow = {extras = ["fastapi"], version = "2024.4.2"}
 Jinja2 = "^3.1.6"
 sentry-sdk = {extras = ["fastapi"], version = "^2.27.0"}
diff --git a/tests/unit/jira/test_client.py b/tests/unit/jira/test_client.py
index 35bfb6a0..be3cbd22 100644
--- a/tests/unit/jira/test_client.py
+++ b/tests/unit/jira/test_client.py
@@ -86,7 +86,7 @@ def test_paginated_projects_with_keys(settings, jira_client, mocked_responses):
         responses.GET,
         url,
         status=200,
-        match=[responses.matchers.query_string_matcher("keys=ABC&keys=DEF")],
+        match=[responses.matchers.query_string_matcher("keys=['ABC', 'DEF']")],
         json=mocked_response_data,
     )
     resp = jira_client.paginated_projects(keys=["ABC", "DEF"])
diff --git a/tests/unit/jira/test_service.py b/tests/unit/jira/test_service.py
index 5800de0b..19ede6fe 100644
--- a/tests/unit/jira/test_service.py
+++ b/tests/unit/jira/test_service.py
@@ -422,8 +422,8 @@ def test_all_project_issue_types_exist(
         status=200,
         match=[
             responses.matchers.query_string_matcher(
-                "keys=ABC&keys=DEF&expand=issueTypes"
-            )
+                "keys=['ABC', 'DEF']&expand=issueTypes"
+            ),
         ],
         json={"values": project_data},
     )