diff --git a/CEDA/__init__.py b/CEDA/__init__.py
index d4ecf67..8ae4140 100644
--- a/CEDA/__init__.py
+++ b/CEDA/__init__.py
@@ -1,7 +1,7 @@
 import sys
 import os
 
-__version__ = "0.1.4"
+__version__ = "0.1.5"
 __author__ = "Terence Lau"
 
 
diff --git a/CEDA/macroecon/cn.py b/CEDA/macroecon/cn.py
index 81293e0..63b6d4c 100644
--- a/CEDA/macroecon/cn.py
+++ b/CEDA/macroecon/cn.py
@@ -681,6 +681,7 @@ def ie_monthly():  # Import & Export
         "Accumulation_Import_YoY_Rate"
     ]
     df["Date"] = pd.to_datetime(df["Date"], format="%Y-%m-%d")
+    df.replace("", np.nan, inplace=True)
     df[["Current_Month_Export", "Current_Month_Import",
         "Accumulation_Export", "Accumulation_Import"]] = \
         df[["Current_Month_Export", "Current_Month_Import",
@@ -690,12 +691,13 @@ def ie_monthly():  # Import & Export
         "Current_Month_Import_YoY_Rate",
         "Current_Month_Import_MoM_Rate",
         "Accumulation_Export_YoY_Rate",
-        "Accumulation_Export_MoM_Rate"]] = df[["Current_Month_Export_YoY_Rate",
-                                               "Current_Month_Export_MoM_Rate",
-                                               "Current_Month_Import_YoY_Rate",
-                                               "Current_Month_Import_MoM_Rate",
-                                               "Accumulation_Export_YoY_Rate",
-                                               "Accumulation_Export_MoM_Rate"]].astype(float) / 100
+        "Accumulation_Import_YoY_Rate"]] = \
+        df[["Current_Month_Export_YoY_Rate",
+            "Current_Month_Export_MoM_Rate",
+            "Current_Month_Import_YoY_Rate",
+            "Current_Month_Import_MoM_Rate",
+            "Accumulation_Export_YoY_Rate",
+            "Accumulation_Import_YoY_Rate"]].astype(float)/100
     return df
 
 
diff --git a/setup.py b/setup.py
index 1a39491..d7861cc 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup, find_packages
 import os
 setup(
     name = "CEDApy",
-    version = "0.1.4",
+    version = "0.1.5",
     keywords = "quantitative economic data",
     long_description = open(
     os.path.join(