diff --git a/var/spack/repos/builtin/packages/py-lmfit/package.py b/var/spack/repos/builtin/packages/py-lmfit/package.py
index 4c798622b02295bc3df6d3a9ac9192d4e15c226f..9f70b89aa033dd17d5e3241c4acc695eab81bcfc 100644
--- a/var/spack/repos/builtin/packages/py-lmfit/package.py
+++ b/var/spack/repos/builtin/packages/py-lmfit/package.py
@@ -12,8 +12,17 @@ class PyLmfit(PythonPackage):
     homepage = "http://lmfit.github.io/lmfit-py/"
     url      = "https://pypi.io/packages/source/l/lmfit/lmfit-0.9.5.tar.gz"
 
-    version('0.9.5', sha256='eebc3c34ed9f3e51bdd927559a5482548c423ad5a0690c6fdcc414bfb5be6667')
+    version('1.0.1',  sha256='d249eb756899360f4d2a544c9458f47fc8f765ac22c09e099530585fd64e286e')
+    version('0.9.15', sha256='cd7bdf47c09a3d49f30dff9a1c7f778973d15d1e1b5dc642f14c22f6630eaf2f')
+    version('0.9.5',  sha256='eebc3c34ed9f3e51bdd927559a5482548c423ad5a0690c6fdcc414bfb5be6667')
 
-    depends_on('py-numpy@1.5:',  type=('build', 'run'))
-    depends_on('py-scipy@0.14:', type=('build', 'run'))
-    depends_on('py-setuptools',  type='build')
+    depends_on('python@3.5:',               type=('build', 'run'), when='@1:')
+    depends_on('python@2.7:2.8,3.5:',       type=('build', 'run'), when='@0.9.15')
+    depends_on('py-asteval@0.9.16',         type=('build', 'run'), when='@0.9.15:')
+    depends_on('py-numpy@1.5:',             type=('build', 'run'), when='@0.9.5:')
+    depends_on('py-numpy@1.16:',            type=('build', 'run'), when='@0.9.15:')
+    depends_on('py-scipy@0.14:',            type=('build', 'run'), when='@0.9.5')
+    depends_on('py-scipy@1.2:',             type=('build', 'run'), when='@0.9.15:')
+    depends_on('py-setuptools',             type='build')
+    depends_on('py-six@1.11:',              type=('build', 'run'), when='@0.9.15')
+    depends_on('py-uncertainties@3.0.1:',   type=('build', 'run'), when='@0.9.15:')