diff --git a/cratedb_toolkit/adapter/pymongo/collection.py b/cratedb_toolkit/adapter/pymongo/collection.py
index 523f80d9..2276f02d 100644
--- a/cratedb_toolkit/adapter/pymongo/collection.py
+++ b/cratedb_toolkit/adapter/pymongo/collection.py
@@ -94,7 +94,7 @@ def insert_returning_id(pd_table, conn, keys, data_iter):
             data.to_sql(
                 name=self.name,
                 schema=self.database.name,
-                con=cratedb.engine,
+                con=cratedb.connection.connection,
                 index=False,
                 # TODO: Handle `append` vs. `replace`.
                 if_exists="append",
@@ -144,7 +144,7 @@ def gen() -> Iterator[Mapping[str, Any]]:
             data.to_sql(
                 name=self.name,
                 schema=self.database.name,
-                con=cratedb.engine,
+                con=cratedb.connection.connection,
                 index=False,
                 # TODO: Handle `append` vs. `replace`.
                 if_exists="append",
diff --git a/pyproject.toml b/pyproject.toml
index 431f22f0..df06bd71 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -177,7 +177,7 @@ mongodb = [
 ]
 pymongo = [
   "jessiql==1.0.0rc1",
-  "pandas==2.1.*",
+  "pandas<2.3",
   "pymongo<4.9",
   "sqlalchemy<2",
 ]