23. Trade and other liabilities
| 
 | 31 December | |
|---|---|---|
| (thousands of €) | 2019 | 2018 | 
| Trade and other liabilities | 142,510 | 68,038 | 
| Other non-current liabilities | 6,989 | 1,578 | 
| Accrued charges | 923 | 890 | 
| Total trade and other liabilities | 150,422 | 70,506 | 
The increase in trade and other liabilities is mainly due to higher accrued trade liabilities on 31 December 2019, reflecting the intensification of our investments in our R&D programs, and increased cost sharing with our partner Gilead. The increase in other non-current liabilities is mainly due to a higher bonus provision caused by the increase in the Galapagos share price and RSU’s granted during 2019.