diff --git a/paramecio/cromosoma/extrafields/arrayfield.py b/paramecio/cromosoma/extrafields/arrayfield.py
index 80cfe00..361d350 100644
--- a/paramecio/cromosoma/extrafields/arrayfield.py
+++ b/paramecio/cromosoma/extrafields/arrayfield.py
@@ -39,7 +39,7 @@ class ArrayField(PhangoField):
 
     def get_type_sql(self):
 
-        return 'TEXT NOT NULL DEFAULT ""'
+        return 'TEXT NOT NULL'
     
     def show_formatted(self, value):
         
diff --git a/paramecio/cromosoma/extrafields/dictfield.py b/paramecio/cromosoma/extrafields/dictfield.py
index 50acb78..fac186d 100644
--- a/paramecio/cromosoma/extrafields/dictfield.py
+++ b/paramecio/cromosoma/extrafields/dictfield.py
@@ -38,7 +38,7 @@ class DictField(PhangoField):
 
     def get_type_sql(self):
 
-        return 'TEXT NOT NULL DEFAULT ""'
+        return 'TEXT NOT NULL'
     
     def show_formatted(self, value):
         
diff --git a/paramecio/cromosoma/extrafields/i18nfield.py b/paramecio/cromosoma/extrafields/i18nfield.py
index 6ee1be9..3366497 100644
--- a/paramecio/cromosoma/extrafields/i18nfield.py
+++ b/paramecio/cromosoma/extrafields/i18nfield.py
@@ -60,7 +60,7 @@ class I18nField(PhangoField):
 
     def get_type_sql(self):
 
-        return 'TEXT NOT NULL DEFAULT ""'
+        return 'TEXT NOT NULL'
 
     def obtain_lang_value(self, lang, value):