diff --git a/var/spack/repos/builtin/packages/py-s3transfer/package.py b/var/spack/repos/builtin/packages/py-s3transfer/package.py
index 1c7c71e378..f683e94820 100644
--- a/var/spack/repos/builtin/packages/py-s3transfer/package.py
+++ b/var/spack/repos/builtin/packages/py-s3transfer/package.py
@@ -12,6 +12,12 @@ class PyS3transfer(PythonPackage):
     homepage = "https://github.com/boto/s3transfer"
     pypi = "s3transfer/s3transfer-0.2.1.tar.gz"
 
+    depends_on('python@3.6:', when='@0.5.0', type=('build', 'run'))
+    depends_on('python@2.7:2.8,3.6:', when='@0.4.2', type=('build', 'run'))
+    depends_on('python@2.7:2.8,3.4:', when='@0.3.4', type=('build', 'run'))
+
+    version('0.5.0', sha256='50ed823e1dc5868ad40c8dc92072f757aa0e653a192845c94a3b676f4a62da4c')
+    version('0.4.2', sha256='cb022f4b16551edebbb31a377d3f09600dbada7363d8c5db7976e7f47732e1b2')
     version('0.3.4', sha256='7fdddb4f22275cf1d32129e21f056337fd2a80b6ccef1664528145b72c49e6d2')
     version('0.2.1', sha256='6efc926738a3cd576c2a79725fed9afde92378aa5c6a957e3af010cb019fac9d')