diff --git a/mapytex/calculus/API/tokens/number.py b/mapytex/calculus/API/tokens/number.py
index 36c8d98..e19d457 100644
--- a/mapytex/calculus/API/tokens/number.py
+++ b/mapytex/calculus/API/tokens/number.py
@@ -13,7 +13,7 @@ Tokens representing interger and decimal
 from decimal import Decimal as _Decimal
 from .token import Token
 from ...core.arithmetic import gcd
-from ...core.random.bltin_gene import filter_random
+from ...core.random.int_gene import filter_random
 from ...core.MO import MO, MOnumber
 from ...core.MO.fraction import MOFraction
 
diff --git a/mapytex/calculus/core/random/bltin_gene.py b/mapytex/calculus/core/random/int_gene.py
similarity index 99%
rename from mapytex/calculus/core/random/bltin_gene.py
rename to mapytex/calculus/core/random/int_gene.py
index b4187cb..79d01cb 100644
--- a/mapytex/calculus/core/random/bltin_gene.py
+++ b/mapytex/calculus/core/random/int_gene.py
@@ -7,7 +7,7 @@
 # Distributed under terms of the MIT license.
 
 """
-Function to create random things
+Function to create random integer
 
 """
 import random