diff --git a/pyproject.toml b/pyproject.toml
index fc816dd..34565c4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,13 +19,14 @@ pydase = ">=0.6.0"
 # optional dependencies
 tiqi-rpc = { git = "ssh://git@gitlab.phys.ethz.ch/tiqi-projects/tiqi-rpc-python.git", optional = true }
 influxdb-client = { version = "^1.36.1", optional = true}
-sqlmodel = { version = "^0.0.8", optional = true}
+sqlmodel = { version = "^0.0.14", optional = true}
 psycopg2-binary = { version = "^2.9.6", optional = true }
+python-dateutil = { version = "^2.8.2", optional = true }
 
 [tool.poetry.extras]
 ionizer = ["tiqi-rpc"]
 influxdbv2 = ["influxdb-client"]
-postgresql = ["sqlmodel", "psycopg2-binary"]
+postgresql = ["sqlmodel", "psycopg2-binary", "python-dateutil"]
 
 [tool.poetry.group.dev]
 optional = true