diff --git a/changelog.txt b/changelog.txt
index b7a38e5..d0f4266 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,3 +1,6 @@
+2014-05-05: Quality improvements to lower-resolution furnaces (0.4.x 
+only), added Carbone locked furnace images.
+
 2014-05-04: Ran all pngs through pngcrush in brute-force mode.
 
 2014-05-02: Added mese and diamond bows and bones for Carbone game. 
diff --git a/default_furnace_bottom.png b/default_furnace_bottom.png
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diff --git a/default_furnace_front.png b/default_furnace_front.png
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diff --git a/default_furnace_lock.png b/default_furnace_lock.png
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diff --git a/default_furnace_lock_active.png b/default_furnace_lock_active.png
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diff --git a/default_furnace_side.png b/default_furnace_side.png
index 8822cf9..69065df 100644
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diff --git a/default_furnace_top.png b/default_furnace_top.png
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