diff --git a/cogs/refractor.py b/cogs/refractor.py
index 08275fe..89436df 100644
--- a/cogs/refractor.py
+++ b/cogs/refractor.py
@@ -77,8 +77,8 @@ def format_refractor_entry(card_state: dict) -> str:
     track = card_state.get("track", {})
     card_type = track.get("card_type", "batter")
     current_tier = card_state.get("current_tier", 0)
-    formula_value = card_state.get("current_value", 0)
-    next_threshold = card_state.get("next_threshold")
+    formula_value = int(card_state.get("current_value", 0))
+    next_threshold = int(card_state.get("next_threshold") or 0) or None
 
     tier_label = TIER_NAMES.get(current_tier, f"T{current_tier}")
     formula_label = FORMULA_LABELS.get(card_type, card_type)
@@ -107,11 +107,11 @@ def apply_close_filter(card_states: list) -> list:
     result = []
     for state in card_states:
         current_tier = state.get("current_tier", 0)
-        formula_value = state.get("current_value", 0)
+        formula_value = int(state.get("current_value", 0))
         next_threshold = state.get("next_threshold")
         if current_tier >= 4 or not next_threshold:
             continue
-        if formula_value >= 0.8 * next_threshold:
+        if formula_value >= 0.8 * int(next_threshold):
             result.append(state)
     return result