diff --git a/src/infi/clickhouse_orm/fields.py b/src/infi/clickhouse_orm/fields.py
index 2829910..44e833a 100644
--- a/src/infi/clickhouse_orm/fields.py
+++ b/src/infi/clickhouse_orm/fields.py
@@ -108,11 +108,10 @@ class DateTimeField(Field):
 class BaseIntField(Field):
 
     def to_python(self, value):
-        if isinstance(value, int):
-            return value
-        if isinstance(value, basestring):
+        try:
             return int(value)
-        raise ValueError('Invalid value for %s - %r' % (self.__class__.__name__, value))
+        except:
+            raise ValueError('Invalid value for %s - %r' % (self.__class__.__name__, value))
 
     def validate(self, value):
         self._range_check(value, self.min_value, self.max_value)
@@ -177,11 +176,10 @@ class Int64Field(BaseIntField):
 class BaseFloatField(Field):
 
     def to_python(self, value):
-        if isinstance(value, float):
-            return value
-        if isinstance(value, basestring) or isinstance(value, int):
+        try:
             return float(value)
-        raise ValueError('Invalid value for %s - %r' % (self.__class__.__name__, value))
+        except:
+            raise ValueError('Invalid value for %s - %r' % (self.__class__.__name__, value))
 
 
 class Float32Field(BaseFloatField):