diff --git a/upbit/authentication.py b/upbit/authentication.py
index 7aa591a..1706185 100644
--- a/upbit/authentication.py
+++ b/upbit/authentication.py
@@ -81,7 +81,7 @@ def generate_query(self, params):
                 params[f"{query_param}[]"] = param
                 query_params = '&'.join([
                     f"{query_param}[]={q}"
-                    for q in query_param
+                    for q in param
                 ])
                 query = f"{query}&{query_params}" if query else query_params
         return query
diff --git a/upbit/pkginfo.py b/upbit/pkginfo.py
index 9f25a57..fba880f 100644
--- a/upbit/pkginfo.py
+++ b/upbit/pkginfo.py
@@ -29,7 +29,7 @@ def _get_versions(package_name):
 PACKAGE_NAME     = 'upbit-client'
 
 OPEN_API_VERSION = '1.2.0'
-CURRENT_VERSION  = OPEN_API_VERSION+'.1'
+CURRENT_VERSION  = OPEN_API_VERSION+'.2'
 
 RELEASED_VERSION = _get_versions(PACKAGE_NAME)
 LATEST_VERSION   = RELEASED_VERSION[0]