diff --git a/var/spack/repos/builtin/packages/py-sphinx/package.py b/var/spack/repos/builtin/packages/py-sphinx/package.py
index 801653b1a0..e4be436a7f 100644
--- a/var/spack/repos/builtin/packages/py-sphinx/package.py
+++ b/var/spack/repos/builtin/packages/py-sphinx/package.py
@@ -40,6 +40,7 @@ class PySphinx(PythonPackage):
         'sphinx.environment.collectors', 'sphinx.environment.adapters'
     ]
 
+    version('1.7.4', '95f3b83f521314600e5b09e99cf32c46')
     version('1.6.3', 'c5ad61f4e0974375ca2c2b58ef8d5411')
     version('1.6.1', '26cb1cdca7aa4afc8c925d926b6268e7')
     version('1.5.5', 'f9581b3556df9722143c47290273bcf8')
@@ -51,6 +52,9 @@ class PySphinx(PythonPackage):
     # Sphinx requires at least Python 2.7 or 3.4 to run
     depends_on('python@2.7:2.8,3.4:', type=('build', 'run'))
 
+    # See here for upstream list of dependencies:
+    # https://github.com/sphinx-doc/sphinx/blob/master/setup.py
+
     # Most Python packages only require py-setuptools as a build dependency.
     # However, py-sphinx requires py-setuptools during runtime as well.
     depends_on('py-setuptools',               type=('build', 'run'))
@@ -65,6 +69,8 @@ class PySphinx(PythonPackage):
     depends_on('py-imagesize', when='@1.4:',  type=('build', 'run'))
     depends_on('py-requests@2.0.0:',          type=('build', 'run'))
     depends_on('py-sphinx-rtd-theme@0.1:',    type=('build', 'run'))  # optional as of 1.4
+    # See: https://github.com/sphinx-doc/sphinx/commit/854a227501a7582510eba41a208d25816f754e0c
+    depends_on('py-packaging', type=('build', 'run'), when='@1.7.4:')
 
     # Sphinx v1.6+ no longer includes websupport by default:
     # http://www.sphinx-doc.org/en/stable/changes.html