diff --git a/setup.py b/setup.py
index 52a73a2..964223f 100644
--- a/setup.py
+++ b/setup.py
@@ -35,10 +35,10 @@ setup(
     platforms='any',
     install_requires=[
         'Flask>=0.9',
-        'Flask-Login==0.2.3',
-        'Flask-Mail==0.7.3',
-        'Flask-Principal==0.3.3',
-        'Flask-WTF==0.8',
+        'Flask-Login>=0.2.3',
+        'Flask-Mail>=0.7.3',
+        'Flask-Principal>=0.3.3',
+        'Flask-WTF>=0.8',
         'itsdangerous>=0.17',
         'passlib>=1.6.1',
     ],