diff --git a/config.default.yaml b/config.default.yaml
index 8e39affe..d48879c6 100644
--- a/config.default.yaml
+++ b/config.default.yaml
@@ -134,7 +134,7 @@ solar_thermal:
 
 # only relevant for foresight = myopic or perfect
 existing_capacities:
-  grouping_years: [1980, 1985, 1990, 1995, 2000, 2005, 2010, 2015, 2019]
+  grouping_years: [1980, 1985, 1990, 1995, 2000, 2005, 2010, 2015, 2020, 2025, 2030]
   threshold_capacity: 10
   conventional_carriers:
     - lignite