diff --git a/eos/effects.py b/eos/effects.py
index 7ad6745a2..13f03aa86 100644
--- a/eos/effects.py
+++ b/eos/effects.py
@@ -17842,7 +17842,7 @@ class Effect5139(BaseEffect):
     @staticmethod
     def handler(fit, module, context, projectionRange, **kwargs):
         fit.modules.filteredItemBoost(lambda mod: mod.item.requiresSkill('Mining'),
-                                      'miningAmount', module.getModifiedItemAttr('shipBonusOREfrig1'),
+                                      'miningAmount', module.getModifiedItemAttr('miningFrigatesBonusOreMiningYield'),
                                       skill='Mining Frigate', **kwargs)
 
 
diff --git a/service/conversions/releaseDec2021.py b/service/conversions/releaseDec2021.py
new file mode 100644
index 000000000..872a195d2
--- /dev/null
+++ b/service/conversions/releaseDec2021.py
@@ -0,0 +1,15 @@
+CONVERSIONS = {
+    # Renamed items
+    'Mercoxit Mining Crystal I': 'Mercoxit Asteroid Ore Mining Crystal Type A I',
+    'Mercoxit Mining Crystal II': 'Mercoxit Asteroid Ore Mining Crystal Type A II',
+    'Ubiquitous Moon Ore Mining Crystal I': 'Ubiquitous Moon Ore Mining Crystal Type A I',
+    'Ubiquitous Moon Ore Mining Crystal II': 'Ubiquitous Moon Ore Mining Crystal Type A II',
+    'Common Moon Ore Mining Crystal I': 'Common Moon Ore Mining Crystal Type A I',
+    'Common Moon Ore Mining Crystal II': 'Common Moon Ore Mining Crystal Type A II',
+    'Uncommon Moon Ore Mining Crystal I': 'Uncommon Moon Ore Mining Crystal Type A I',
+    'Uncommon Moon Ore Mining Crystal II': 'Uncommon Moon Ore Mining Crystal Type A II',
+    'Rare Moon Ore Mining Crystal I': 'Rare Moon Ore Mining Crystal Type A I',
+    'Rare Moon Ore Mining Crystal II': 'Rare Moon Ore Mining Crystal Type A II',
+    'Exceptional Moon Ore Mining Crystal I': 'Exceptional Moon Ore Mining Crystal Type A I',
+    'Exceptional Moon Ore Mining Crystal II': 'Exceptional Moon Ore Mining Crystal Type A II',
+}