diff --git a/config.default.yaml b/config.default.yaml
index 128c7bac..6983945c 100755
--- a/config.default.yaml
+++ b/config.default.yaml
@@ -39,7 +39,7 @@ enable:
 
 electricity:
   voltages: [220., 300., 380.]
-  gaslimit: false
+  gaslimit: false # global gas usage limit of X MWh_th
   co2limit: 7.75e+7 # 0.05 * 3.1e9*0.5
   co2base: 1.487e+9
   agg_p_nom_limits: data/agg_p_nom_minmax.csv
diff --git a/doc/release_notes.rst b/doc/release_notes.rst
index 4ef5e956..78a9997d 100644
--- a/doc/release_notes.rst
+++ b/doc/release_notes.rst
@@ -22,6 +22,8 @@ Energy Security Release (April 2022)
     * old: ``estimate_renewable_capacities_from_capacity_stats``
     * new: ``estimate_renewable_capacities``
 
+* Add function to add global constraint on use of gas in :mod:`prepare_network`. This can be activated with `electricity: gaslimit:` given in MWh. 
+
 * The powerplants that have been shut down before 2021 are filtered out. 
 
 **Bugs and Compatibility**