diff --git a/app/models/etsource/merit_order.rb b/app/models/etsource/merit_order.rb
index 52e69916d..171bfb220 100644
--- a/app/models/etsource/merit_order.rb
+++ b/app/models/etsource/merit_order.rb
@@ -84,7 +84,7 @@ def import_agriculture_heat
     #
     # Returns a hash.
     def import(attribute)
-      Rails.cache.fetch("#{attribute}_hash") do
+      NastyCache.instance.fetch("#{attribute}_hash") do
         mo_nodes = Atlas::EnergyNode.all.select(&attribute).sort_by(&:key)
         mo_data  = {}
 
diff --git a/app/models/etsource/molecules.rb b/app/models/etsource/molecules.rb
index 8db8dc181..318fefc65 100644
--- a/app/models/etsource/molecules.rb
+++ b/app/models/etsource/molecules.rb
@@ -12,7 +12,7 @@ module Molecules
     #
     # Returns an Array of Symbols.
     def from_energy_keys
-      Rails.cache.fetch('molecules.from_energy_keys') do
+      NastyCache.instance.fetch('molecules.from_energy_keys') do
         Atlas::MoleculeNode.all.select(&:from_energy).map(&:key).sort
       end
     end
@@ -24,7 +24,7 @@ def from_energy_keys
     #
     # Returns an Array of Symbols.
     def from_molecules_keys
-      Rails.cache.fetch('molecules.from_molecules_keys') do
+      NastyCache.instance.fetch('molecules.from_molecules_keys') do
         Atlas::EnergyNode.all.select(&:from_molecules).map(&:key).sort
       end
     end