diff --git a/setup.cfg b/setup.cfg
index 8f7e0f4..92bbce5 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -45,15 +45,15 @@ zip_safe = False
 include_package_data = True
 packages = aakbar
 install_requires =
-    biopython
+    biopython==1.71
     click>=5.0
-    click_plugins
-    coverage
-    matplotlib
-    numpy
-    pandas
-    pyfaidx
-    pyyaml
+    click_plugins==1.0.3
+    coverage==4.5.1
+    matplotlib==2.2.3
+    numpy==1.15.1
+    pandas==0.23.4
+    pyfaidx==0.5.4.2
+    pyyaml==3.13
 
 [options.package_data]
 * =