diff --git a/data/json/harvest.json b/data/json/harvest.json
index 726f706f3f7dd..5e0ff698ee89d 100644
--- a/data/json/harvest.json
+++ b/data/json/harvest.json
@@ -1733,9 +1733,9 @@
     "type": "harvest",
     "entries": [
       { "drop": "blood_acid_underground", "type": "blood", "mass_ratio": 0.1 },
-      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.4 },
-      { "drop": "mutant_fat", "type": "flesh", "mass_ratio": 0.1 },
-      { "drop": "mutant_fat", "type": "offal", "mass_ratio": 0.1 }
+      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.36 },
+      { "drop": "mutant_fat", "type": "flesh", "mass_ratio": 0.08 },
+      { "drop": "acidchitin_piece", "type": "bone", "mass_ratio": 0.06 }
     ]
   },
   {
diff --git a/data/json/monsters/insect_spider.json b/data/json/monsters/insect_spider.json
index 531bf79d6dc02..f5d6d4899bd9d 100644
--- a/data/json/monsters/insect_spider.json
+++ b/data/json/monsters/insect_spider.json
@@ -51,7 +51,7 @@
     "melee_damage": [ { "damage_type": "cut", "amount": 4 } ],
     "dodge": 4,
     "bleed_rate": 60,
-    "harvest": "arachnid_acid",
+    "harvest": "underground_acid",
     "dissect": "dissect_troglobite_sample_small",
     "fear_triggers": [ "FIRE" ],
     "zombify_into": "mon_meat_cocoon_med",