diff --git a/catalyst/examples/portfolio_optimization.py b/catalyst/examples/portfolio_optimization.py
index 37f8a55d..26c957b6 100644
--- a/catalyst/examples/portfolio_optimization.py
+++ b/catalyst/examples/portfolio_optimization.py
@@ -146,4 +146,5 @@ if __name__ == '__main__':
                             start=start,
                             end=end,
                             exchange_name='poloniex',
-                            capital_base=100000, )
+                            capital_base=100000,
+                            base_currency='usdt', )