diff --git a/meteosclient/api/base.py b/meteosclient/api/base.py
index 5c6166b..19e30cf 100644
--- a/meteosclient/api/base.py
+++ b/meteosclient/api/base.py
@@ -13,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import base64
 import copy
 import json
 import logging
@@ -172,7 +173,8 @@ class ResourceManager(object):
         resp = self.api.get(url)
         if resp.status_code == 200:
             result = get_json(resp)
-            data = result[response_key]
+            base64_params = ['args', 'params']
+            data = decode_base64(result[response_key], base64_params)
             meta = result.get('markers')
 
             next, prev = None, None
@@ -234,6 +236,16 @@ def get_json(response):
         return json.loads(response.content)
 
 
+def decode_base64(data, base64_params):
+
+    for item in data:
+        for key, value in item.items():
+            if key in base64_params:
+                item[key] = base64.b64decode(value)
+
+    return data
+
+
 class APIException(Exception):
     def __init__(self, error_code=None, error_name=None, error_message=None):
         super(APIException, self).__init__(error_message)
diff --git a/meteosclient/api/shell.py b/meteosclient/api/shell.py
index e27aeb7..87671bc 100644
--- a/meteosclient/api/shell.py
+++ b/meteosclient/api/shell.py
@@ -378,8 +378,7 @@ def do_learning_list(cs, args):
                'status',
                'args',
                'stdout')
-    base64_params = ['args']
-    utils.print_list(learnings, columns, base64_params=base64_params)
+    utils.print_list(learnings, columns)
 
 
 @utils.arg('id',
diff --git a/meteosclient/openstack/common/cliutils.py b/meteosclient/openstack/common/cliutils.py
index a1ac7f4..08dca38 100644
--- a/meteosclient/openstack/common/cliutils.py
+++ b/meteosclient/openstack/common/cliutils.py
@@ -18,7 +18,6 @@
 
 from __future__ import print_function
 
-import base64
 import getpass
 import inspect
 import os
@@ -139,13 +138,12 @@ def isunauthenticated(func):
     return getattr(func, 'unauthenticated', False)
 
 
-def print_list(objs, fields, base64_params=[], formatters=None, sortby_index=0,
+def print_list(objs, fields, formatters=None, sortby_index=0,
                mixed_case_fields=None, field_labels=None):
     """Print a list of objects as a table, one row per object.
 
     :param objs: iterable of :class:`Resource`
     :param fields: attributes that correspond to columns, in order
-    :param base64_params: indicate a column which encoded by base64
     :param formatters: `dict` of callables for field formatting
     :param sortby_index: index of the field for sorting table rows
     :param mixed_case_fields: fields corresponding to object attributes that
@@ -178,9 +176,6 @@ def print_list(objs, fields, base64_params=[], formatters=None, sortby_index=0,
                     field_name = field.replace(' ', '_')
                 else:
                     field_name = field.lower().replace(' ', '_')
-                if field in base64_params:
-                    data = base64.b64decode(getattr(o, field_name, ''))
-                else:
                     data = getattr(o, field_name, '')
                 row.append(data)
         pt.add_row(row)