There are some more advanced methods of decomposition available, such as Seasonal and Trend decomposition using Loess (STL decomposition), Seasonal Extraction in ARIMA Time Series (SEATS Decomposition), and X11 decomposition. More information can be found in the following book:

• Hyndman, R.J., and Athanasopoulos, G. (2018) Forecasting: principles and practice, 2nd edition, OTexts: Melbourne, Australia. OTexts.com/fpp2. Accessed on November 26, 2019.