diff --git a/drcr/models.py b/drcr/models.py
index 77d6504..36ceef6 100644
--- a/drcr/models.py
+++ b/drcr/models.py
@@ -241,12 +241,13 @@ class TrialBalancer:
 			# First SELECT the last applicable dt by account
 			# Then, among the transactions with that dt, SELECT the last applicable transaction_id
 			# Then extract the running_balance for each account at that transaction_id
+			# NB: We need to specify DATE(...) otherwise SQLite appears to do a string comparison which doesn't work properly with SQLAlchemy's prepared statement?
 			running_balances = db.session.execute('''
 				SELECT p3.account, running_balance FROM
 				(
 					SELECT p1.account, max(p2.transaction_id) AS max_tid FROM
 					(
-						SELECT account, max(dt) AS max_dt FROM postings JOIN transactions ON postings.transaction_id = transactions.id WHERE dt < :start_date GROUP BY account
+						SELECT account, max(dt) AS max_dt FROM postings JOIN transactions ON postings.transaction_id = transactions.id WHERE DATE(dt) < DATE(:start_date) GROUP BY account
 					) p1
 					JOIN postings p2 ON p1.account = p2.account AND p1.max_dt = transactions.dt JOIN transactions ON p2.transaction_id = transactions.id GROUP BY p2.account
 				) p3
@@ -282,7 +283,7 @@ class TrialBalancer:
 				(
 					SELECT p1.account, max(p2.transaction_id) AS max_tid FROM
 					(
-						SELECT account, max(dt) AS max_dt FROM postings JOIN transactions ON postings.transaction_id = transactions.id WHERE dt <= :end_date GROUP BY account
+						SELECT account, max(dt) AS max_dt FROM postings JOIN transactions ON postings.transaction_id = transactions.id WHERE DATE(dt) <= DATE(:end_date) GROUP BY account
 					) p1
 					JOIN postings p2 ON p1.account = p2.account AND p1.max_dt = transactions.dt JOIN transactions ON p2.transaction_id = transactions.id GROUP BY p2.account
 				) p3