diff -Nurp awscli-1.16.28.orig/setup.py awscli-1.16.28/setup.py
--- awscli-1.16.28.orig/setup.py	2018-10-05 17:12:53.000000000 -0500
+++ awscli-1.16.28/setup.py	2018-11-06 09:03:13.254273110 -0600
@@ -23,12 +23,15 @@ def find_version(*file_paths):
     raise RuntimeError("Unable to find version string.")
 
 
-requires = ['botocore==1.12.18',
-            'colorama>=0.2.5,<=0.3.9',
-            'docutils>=0.10',
-            'rsa>=3.1.2,<=3.5.0',
-            's3transfer>=0.1.12,<0.2.0',
-            'PyYAML>=3.10,<=3.13']
+requires = [
+    # upstream releases awscli and botocore in lockstep, keep this pinned
+    'botocore==1.12.18',
+    'colorama>=0.2.5',
+    'docutils>=0.10',
+    'rsa>=3.1.2',
+    's3transfer>=0.1.12',
+    'PyYAML>=3.10'
+]
 
 
 if sys.version_info[:2] == (2, 6):