diff --git a/py2_requirements.txt b/py2_requirements.txt
index 2cbeb90..6672686 100644
--- a/py2_requirements.txt
+++ b/py2_requirements.txt
@@ -2,10 +2,10 @@
 # https://github.com/damnever/pigar
 
 # pigar/utils.py: 11
-colorama == 0.3.9
+colorama == 0.4.1
 
 # pigar/pypi.py: 21
 futures == 3.2.0
 
 # pigar/pypi.py: 22
-requests == 2.18.4
+requests == 2.21.0
diff --git a/py3_requirements.txt b/py3_requirements.txt
index 422d86e..3832742 100644
--- a/py3_requirements.txt
+++ b/py3_requirements.txt
@@ -2,7 +2,7 @@
 # https://github.com/damnever/pigar
 
 # pigar/utils.py: 11
-colorama == 0.3.9
+colorama == 0.4.1
 
 # pigar/pypi.py: 22
-requests == 2.18.4
+requests == 2.21.0
diff --git a/setup.py b/setup.py
index c1c0b60..7020f28 100644
--- a/setup.py
+++ b/setup.py
@@ -24,8 +24,8 @@
     change_logs = f.read()
 
 install_requires = [
-    'colorama==0.3.9',
-    'requests==2.18.4',
+    'colorama>=0.3.9',
+    'requests>=2.20.0',
 ]
 if sys.version_info < (3, 2):
     install_requires.append('futures')