diff --git a/requirements.txt b/requirements.txt
index 7604ca7..f6231bb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,9 +1,9 @@
 numpy==1.14.2
 pandas==0.22.0
-psycopg2==2.7.4
+psycopg2==2.7.5
 pyodbc==4.0.23
 python-dateutil==2.7.2
-pytz==2018.4
+pytz==2017.2
 six==1.11.0
 SQLAlchemy==1.2.7
-sqlalchemy-citext==1.3.post0
+sqlalchemy-citext==1.3.post0
\ No newline at end of file
diff --git a/setup.py b/setup.py
index ba27fb1..fdd3b41 100644
--- a/setup.py
+++ b/setup.py
@@ -6,12 +6,12 @@
       install_requires=[
           'numpy==1.14.2',
           'pandas==0.22.0',
-          'psycopg2==2.7.4',
+          'psycopg2==2.7.5',
           'pyodbc==4.0.23',
           'python-dateutil==2.7.2',
-          'pytz==2018.4',
+          'pytz==2017.2',
           'six==1.11.0',
           'SQLAlchemy==1.2.7',
           'sqlalchemy-citext==1.3.post0'
       ]
-      )
+      )
\ No newline at end of file