diff --git a/config/config.default.yaml b/config/config.default.yaml
index ca2d1ba3d..ad4144d56 100644
--- a/config/config.default.yaml
+++ b/config/config.default.yaml
@@ -668,7 +668,7 @@ industry:
 # docs in https://pypsa-eur.readthedocs.io/en/latest/configuration.html#costs
 costs:
   year: 2030
-  version: v0.8.0
+  version: v0.8.1
   rooftop_share: 0.14  # based on the potentials, assuming  (0.1 kW/m2 and 10 m2/person)
   social_discountrate: 0.02
   fill_values:
diff --git a/doc/release_notes.rst b/doc/release_notes.rst
index d6072d7d1..8167f6dd2 100644
--- a/doc/release_notes.rst
+++ b/doc/release_notes.rst
@@ -9,6 +9,7 @@ Release Notes
 
 Upcoming Release
 ================
+* Upgrade default techno-economic assumptions to ``technology-data`` v0.8.1.
 
 * Linearly interpolate missing investment periods in year-dependent
   configuration options.