diff --git a/backend/poetry.lock b/backend/poetry.lock
index 26d740b00..289dcd49b 100644
--- a/backend/poetry.lock
+++ b/backend/poetry.lock
@@ -2701,13 +2701,13 @@ pbr = ">=2.0.0,<2.1.0 || >2.1.0"
 
 [[package]]
 name = "sumo-wrapper-python"
-version = "0.4.0"
+version = "0.4.1"
 description = "Python wrapper for the Sumo API"
 optional = false
 python-versions = ">=3.6"
 files = [
-    {file = "sumo-wrapper-python-0.4.0.tar.gz", hash = "sha256:d53b596f8a526c649ef7f6a4297826cb0496f0d421f64b20f101cd41d16e0e2e"},
-    {file = "sumo_wrapper_python-0.4.0-py3-none-any.whl", hash = "sha256:df0c2709e6d5d33a2d5a8e13db684a03601fb1bb4f78ccb668170f9daf28d173"},
+    {file = "sumo-wrapper-python-0.4.1.tar.gz", hash = "sha256:7018c0162b9510937c976c1d7179bca7a71ae06278c219407ff27ed4bbee4037"},
+    {file = "sumo_wrapper_python-0.4.1-py3-none-any.whl", hash = "sha256:c7cc4c7331cc486b836fa0f39d0eb016b8fb7463f847f71e525a066da18ffce5"},
 ]
 
 [package.dependencies]
@@ -3047,4 +3047,4 @@ tests = ["hypothesis", "pytest", "pytest-benchmark", "pytest-mock", "pytest-snap
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.11"
-content-hash = "9e2918b5054ba8591d7dace93c523e26be1fa807ec8d384d64d4d0e73b655d32"
+content-hash = "3a5231dade6fe172008bdfab1842eaa86f7b3d71249b06af756fa979948033ee"
diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 41a6c66c4..0690fc6c2 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -24,7 +24,7 @@ httpx = "^0.24.0"
 psutil = "^5.9.5"
 vtk = "^9.2.6"
 fmu-sumo = "^0.5.4"
-sumo-wrapper-python = "^0.4.0"
+sumo-wrapper-python = "^0.4.1"
 
 
 [tool.poetry.group.dev.dependencies]
diff --git a/backend/src/services/sumo_access/parameter_access.py b/backend/src/services/sumo_access/parameter_access.py
index 8c816ef68..119c4a869 100644
--- a/backend/src/services/sumo_access/parameter_access.py
+++ b/backend/src/services/sumo_access/parameter_access.py
@@ -36,7 +36,7 @@ async def get_parameters_and_sensitivities(self) -> EnsembleParameters:
             raise ValueError(f"Multiple parameter tables found {self._case.name,self._iteration_name}")
 
         table = await table_collection.getitem_async(0)
-        byte_stream: BytesIO = table.blob
+        byte_stream: BytesIO = await table.blob_async
         table = pq.read_table(byte_stream)
 
         et_download_arrow_table_ms = timer.lap_ms()
diff --git a/backend/src/services/sumo_access/summary_access.py b/backend/src/services/sumo_access/summary_access.py
index 4cdadb438..b127dfb99 100644
--- a/backend/src/services/sumo_access/summary_access.py
+++ b/backend/src/services/sumo_access/summary_access.py
@@ -237,7 +237,7 @@ async def _load_arrow_table_for_from_sumo(case: Case, iteration_name: str, vecto
     # The tables we have seen so far have format set to 'arrow', but the actual data is in parquet format.
     # This must be a bug or a misunderstanding.
     # For now, just read the parquet data into an arrow table
-    byte_stream: BytesIO = sumo_table.blob
+    byte_stream: BytesIO = await sumo_table.blob_async
     table = pq.read_table(byte_stream)
     et_download_arrow_table_ms = timer.lap_ms()