diff --git a/pina/equation/__init__.py b/pina/equation/__init__.py
index 9877701..7eabcc2 100644
--- a/pina/equation/__init__.py
+++ b/pina/equation/__init__.py
@@ -7,6 +7,6 @@ __all__ = [
     'Laplace',
 ]
 
-from .equation import *
-from .equation_factory import *
-from .system_equation import *
\ No newline at end of file
+from .equation import Equation
+from .equation_factory import FixedFlux, FixedGradient, Laplace, FixedValue
+from .system_equation import SystemEquation
\ No newline at end of file