diff --git a/tools/migration/cfg/migrator_1_5_0/__init__.py b/tools/migration/cfg/migrator_1_5_0/__init__.py
index a239df0a1..bead0a172 100644
--- a/tools/migration/cfg/migrator_1_5_0/__init__.py
+++ b/tools/migration/cfg/migrator_1_5_0/__init__.py
@@ -26,12 +26,12 @@ default = {
 
 def migrate(input_cfg, output_cfg):
     d = utils.read_conf(input_cfg)
-    keys = default.keys()
+    keys = list(default.keys())
     keys.extend(['hostname', 'ui_url_protocol', 'max_job_workers', 'customize_crt', 
             'ssl_cert', 'ssl_cert_key', 'secretkey_path', 'admiral_url', 'db_password', 'clair_db_password'])
     val = {}
     for k in keys:
-        if d.has_key(k):
+        if k in d:
             val[k] = d[k]
         else:
             val[k] = default[k]
diff --git a/tools/migration/cfg/utils.py b/tools/migration/cfg/utils.py
index 5996012c5..34ed654d3 100644
--- a/tools/migration/cfg/utils.py
+++ b/tools/migration/cfg/utils.py
@@ -29,13 +29,13 @@ def read_conf(path):
 def get_conf_version(path):
     d = read_conf(path)
 #    print json.dumps(d,indent=4)
-    if d.has_key("_version"): # >=1.5.0
+    if "_version" in d: # >=1.5.0
         return d["_version"]
-    if not d.has_key("clair_db_password"):
+    if not "clair_db_password" in d:
         return "unsupported"
-    if d.has_key("registry_storage_provider_name"):
+    if "registry_storage_provider_name" in d:
         return "1.4.0"
-    if d.has_key("uaa_endpoint"):
+    if "uaa_endpoint" in d:
         return "1.3.0"
     return "1.2.0"