diff --git a/pyproject.toml b/pyproject.toml
index ca3e559..e693472 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,6 @@ keywords = ["aiida", "workflows", "lammps"]
 requires-python = ">=3.8"
 dependencies = [
     "aiida-core[atomic-tools]>=2.0.0,<3.0.0",
-    "psycopg2-binary",
     "importlib_resources",
     "jsonschema",
     "numpy",