diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -18,12 +18,12 @@ setup(
         'efopen'
     ],
     install_requires=[
-        'boto3',
-        'click',
-        'PyYAML',
-        'cfn-lint',
-        'requests',
-        'yamllint'
+        'boto3==1.16.39',
+        'click==7.1.2',
+        'PyYAML==5.3.1',
+        'cfn-lint==0.44.0',
+        'requests==2.25.1',
+        'yamllint==1.25.0'
     ],
     extras_require={
         'test': [
Fix version of ef-open dependencies (#<I>)