diff --git a/laborious/workflows/drift.py b/laborious/workflows/drift.py
index 85780f7..769c613 100644
--- a/laborious/workflows/drift.py
+++ b/laborious/workflows/drift.py
@@ -42,7 +42,7 @@ class Drift:
             FROM "{input_data['schema']}"."{input_data['source_table_name']}"
             WHERE
                 model_id = '{input_data['model_id']}' AND
-                timestamp > NOW() - INTERVAL {input_data['interval']} minutes
+                timestamp > NOW() - INTERVAL '{input_data['interval']} minutes'
             ORDER BY timestamp ASC
         """
 
diff --git a/laborious/workflows/simple_metrics.py b/laborious/workflows/simple_metrics.py
index 7ab7153..438b98d 100644
--- a/laborious/workflows/simple_metrics.py
+++ b/laborious/workflows/simple_metrics.py
@@ -42,7 +42,7 @@ class SimpleMetrics:
                 p.prediction is not null and
                 ld.variable = '{target_name}' and
                 ld.value is not null and
-                p."timestamp" >= NOW() - INTERVAL {interval_minutes} minutes
+                p."timestamp" >= NOW() - INTERVAL '{interval_minutes} minutes'
             order by
                 p."timestamp" desc;
         """
diff --git a/requirements.txt b/requirements.txt
index d475d8a..abc1753 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ sqlalchemy
 asyncua
 redis
 git+ssh://git@github.com/Aignosi/sientia-dataops-library.git@1.6.1
-git+ssh://git@github.com/Aignosi/sientia-mlops-library.git@0.40.2
+git+ssh://git@github.com/Aignosi/sientia-mlops-library.git@0.40.5
 prometheus-client
 botocore
 boto3
diff --git a/tests/laborious/workflows/test_drift.py b/tests/laborious/workflows/test_drift.py
index 25870ae..8f013d3 100644
--- a/tests/laborious/workflows/test_drift.py
+++ b/tests/laborious/workflows/test_drift.py
@@ -60,7 +60,7 @@ async def test_run(workflow_mock: AsyncMock, drift: Drift):
             FROM "{input_data['schema']}"."{input_data['source_table_name']}"
             WHERE
                 model_id = '{input_data['model_id']}' AND
-                timestamp > NOW() - INTERVAL {input_data['interval']} minutes
+                timestamp > NOW() - INTERVAL '{input_data['interval']} minutes'
             ORDER BY timestamp ASC
         """
 
diff --git a/tests/laborious/workflows/test_simple_metrics.py b/tests/laborious/workflows/test_simple_metrics.py
index 12c2cac..0d96bc5 100644
--- a/tests/laborious/workflows/test_simple_metrics.py
+++ b/tests/laborious/workflows/test_simple_metrics.py
@@ -61,7 +61,7 @@ async def test_run(workflow_mock: AsyncMock, simple_metrics: SimpleMetrics):
                 p.prediction is not null and
                 ld.variable = '{input_data['model_config']['target']}' and
                 ld.value is not null and
-                p."timestamp" >= NOW() - INTERVAL {input_data['interval_minutes']} minutes
+                p."timestamp" >= NOW() - INTERVAL '{input_data['interval_minutes']} minutes'
             order by
                 p."timestamp" desc;
         """