diff --git a/requirements.txt b/requirements.txt
index 34e1dee..ea5486e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-pandas==0.21.0
+pandas>=0.21.0
 numpy>=1.15.0
 matplotlib>=2.2.2
 boto3>=1.9.36
diff --git a/setup.py b/setup.py
index e07c0d1..574df4e 100644
--- a/setup.py
+++ b/setup.py
@@ -31,7 +31,7 @@ def read(fname):
         os.path.splitext(os.path.basename(path))[0] for path in glob("src/*.py")
     ],
     install_requires=[
-        "pandas==0.21.0",
+        "pandas>=0.21.0",
         "numpy>=1.15.0",
         "matplotlib>=2.2.2",
         "boto3>=1.9.36",
diff --git a/src/backlight/__init__.py b/src/backlight/__init__.py
index b7ffcb1..8c5a20a 100644
--- a/src/backlight/__init__.py
+++ b/src/backlight/__init__.py
@@ -1,4 +1,4 @@
 __author__ = "AlpacaJapan Co., Ltd."
-__version__ = "1.0.8"
-__release__ = "1.0.8"
+__version__ = "1.0.9"
+__release__ = "1.0.9"
 __license__ = "MIT"