diff --git a/pyproject.toml b/pyproject.toml
index 745de02..956dd76 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,14 +39,11 @@ dev = [
     "pytest",
     "pytest-cov",
     "ruff",
-    # "sphinx-autobuild",
-    # "sphinx-copybutton",
-    # "sphinx-design",
     "tox-direct",
     "types-mock",
     "pytest-asyncio",
-    "httpx",
-    # "pydata-sphinx-theme < 0.10.1",
+    # https://github.com/encode/httpx/blob/master/CHANGELOG.md#0270-21st-february-2024
+    "httpx~=0.26.0",
     "setuptools_scm[toml]>=6.2"
 ]
 
diff --git a/src/pato/crud/collections.py b/src/pato/crud/collections.py
index f607e1f..5ea1479 100644
--- a/src/pato/crud/collections.py
+++ b/src/pato/crud/collections.py
@@ -80,7 +80,7 @@ def get_tomograms(
             _job_status_description.label("status"),
         )
         .select_from(ProcessingJob)
-        .join(AutoProcProgram)
+        .outerjoin(AutoProcProgram)
         .outerjoin(Tomogram)
         .filter(ProcessingJob.dataCollectionId == collectionId)
         .order_by(ProcessingJob.processingJobId.desc())
diff --git a/src/pato/models/response.py b/src/pato/models/response.py
index 9cf08f3..6f39b5c 100644
--- a/src/pato/models/response.py
+++ b/src/pato/models/response.py
@@ -385,7 +385,7 @@ class AutoProcProgram(OrmBaseModel):
 
 
 class ProcessingJobResponse(OrmBaseModel):
-    AutoProcProgram: AutoProcProgram
+    AutoProcProgram: Optional[AutoProcProgram]
     ProcessingJob: ProcessingJob
     status: str
 
diff --git a/tests/collections/test_tomogram.py b/tests/collections/test_tomogram.py
index 67c7e39..d99dff0 100644
--- a/tests/collections/test_tomogram.py
+++ b/tests/collections/test_tomogram.py
@@ -16,3 +16,10 @@ def test_get_no_tomogram(mock_permissions, client):
     resp = client.get("/dataCollections/6017413/tomograms")
     assert resp.status_code == 200
     assert resp.json()["items"][1]["Tomogram"] is None
+
+
+def test_get_no_autoproc(mock_permissions, client):
+    """Get tomograms with no linked autoprocessing programs"""
+    resp = client.get("/dataCollections/6017406/tomograms")
+    assert resp.status_code == 200
+    assert resp.json()["total"] == 29