diff --git a/src/adv_types.py b/src/adv_types.py
index c729109..3ee3449 100644
--- a/src/adv_types.py
+++ b/src/adv_types.py
@@ -1,11 +1,12 @@
 import struct
+from decimal import Decimal
 
-def pwp_number(fmt):
+def pwp_number(fmt, value_type):
     size = struct.calcsize(fmt)
 
     def decorator(cls):
         def __init__(self, value):
-            self.value = value
+            self.value = value_type(value)
 
         def to_com(self):
             return struct.pack(fmt, self.value)
@@ -24,34 +25,37 @@ def pwp_number(fmt):
     return decorator
 
 # Unsigned integers
-@pwp_number("<B")
+@pwp_number("<B", int)
 class u8: pass
 
-@pwp_number("<H")
+@pwp_number("<H", int)
 class u16: pass
 
-@pwp_number("<I")
+@pwp_number("<I", int)
 class u32: pass
 
-@pwp_number("<Q")
+@pwp_number("<Q", int)
 class u64: pass
 
 # Signed integers
-@pwp_number("<b")
+@pwp_number("<b", int)
 class i8: pass
 
-@pwp_number("<h")
+@pwp_number("<h", int)
 class i16: pass
 
-@pwp_number("<i")
+@pwp_number("<i", int)
 class i32: pass
 
-@pwp_number("<q")
+@pwp_number("<q", int)
 class i64: pass
 
 # Floating point
-@pwp_number("<f")
+@pwp_number("<f", float)
 class f32: pass
 
-@pwp_number("<d")
-class f64: pass
\ No newline at end of file
+@pwp_number("<d", float)
+class f64: pass
+
+@pwp_number("<BiI", Decimal)
+class decimal: pass
diff --git a/src/general.py b/src/general.py
index f981133..a59902f 100644
--- a/src/general.py
+++ b/src/general.py
@@ -68,9 +68,9 @@ class Candle:
     close_time: u64
     coin: str
     interval: str
-    open: f64
-    high: f64
-    low: f64
-    close: f64
-    volume: f64
+    open: decimal
+    high: decimal
+    low: decimal
+    close: decimal
+    volume: decimal
     num_trades: u64