diff --git a/src/rougail/annotator/variable.py b/src/rougail/annotator/variable.py
index a03b1ad42..5022a60f7 100644
--- a/src/rougail/annotator/variable.py
+++ b/src/rougail/annotator/variable.py
@@ -116,14 +116,20 @@ class Annotator(Walk):  # pylint: disable=R0903
                 continue
             if variable.type in RENAME_TYPE:
                 warning = f'the variable "{ variable.path }" has a depreciated type "{variable.type}", please use "{RENAME_TYPE[variable.type]}" instead in {display_xmlfiles(variable.xmlfiles)}'
-                warn(warning)
+                warn(warning,
+                     DeprecationWarning,
+                     )
                 variable.type = RENAME_TYPE[variable.type]
             if variable.type == 'cidr':
                 warning = f'the variable "{ variable.path }" has a depreciated type "{variable.type}", please use type "ip" with attribute cidr=True instead in {display_xmlfiles(variable.xmlfiles)}'
-                warn(warning)
+                warn(warning,
+                     DeprecationWarning,
+                     )
             if variable.type == 'network_cidr':
                 warning = f'the variable "{ variable.path }" has a depreciated type "{variable.type}", please use type "network" with attribute cidr=True instead in {display_xmlfiles(variable.xmlfiles)}'
-                warn(warning)
+                warn(warning,
+                     DeprecationWarning,
+                     )
             self.objectspace.informations.add(
                 variable.path, "ymlfiles", variable.xmlfiles
             )
diff --git a/src/rougail/convert/convert.py b/src/rougail/convert/convert.py
index ef3318904..509650b0c 100644
--- a/src/rougail/convert/convert.py
+++ b/src/rougail/convert/convert.py
@@ -585,7 +585,10 @@ class ParserVariable:
                 del family["variable"]
                 if self.version != "1.0":
                     warning = f'"variable" attribute in dynamic family "{ path }" is depreciated in {filename}'
-                    warn(warning)
+                    warn(warning,
+                         DeprecationWarning,
+                         stacklevel=2,
+                         )
             if "variable" in family:
                 raise Exception(
                     f'dynamic family must not have "variable" attribute for "{family["path"]}" in {family["xmlfiles"]}'
diff --git a/src/rougail/convert/object_model.py b/src/rougail/convert/object_model.py
index 765a2f917..deadf3828 100644
--- a/src/rougail/convert/object_model.py
+++ b/src/rougail/convert/object_model.py
@@ -307,7 +307,10 @@ class JinjaCalculation(Calculation):
         objectspace.jinja[jinja_path] = self.jinja
         if return_type in RENAME_TYPE:
             warning = f'the variable "{ self.path }" has a depreciated return_type "{return_type}", please use "{RENAME_TYPE[return_type]}" instead in {display_xmlfiles(variable.xmlfiles)}'
-            warn(warning)
+            warn(warning,
+                 DeprecationWarning,
+                 stacklevel=2,
+                 )
             return_type = RENAME_TYPE[return_type]
         default = {
             "function": function,
diff --git a/src/rougail/error.py b/src/rougail/error.py
index f6661482f..04b165434 100644
--- a/src/rougail/error.py
+++ b/src/rougail/error.py
@@ -75,6 +75,10 @@ class ExtentionError(Exception):
     pass
 
 
+class RougailWarning(UserWarning):
+    pass
+
+
 ## ---- specific exceptions ----