diff --git a/02_Day_Data_types/02_day_data_types.md b/02_Day_Data_types/02_day_data_types.md
index e27d43d..e03bb34 100644
--- a/02_Day_Data_types/02_day_data_types.md
+++ b/02_Day_Data_types/02_day_data_types.md
@@ -63,6 +63,7 @@ Primitive data types in JavaScript include:
  4. Null - empty value or no value
  5. Undefined - a declared variable without a value
  6. Symbol - A unique value that can be generated by Symbol constructor
+ 7. BigInt - A numeric primitive in JavaScript that can represent integers with arbitrary magnitude
 
 Non-primitive data types in JavaScript includes: