diff --git a/var/spack/repos/builtin/packages/py-iminuit/package.py b/var/spack/repos/builtin/packages/py-iminuit/package.py
index 845d23503c..787cf7e2fe 100644
--- a/var/spack/repos/builtin/packages/py-iminuit/package.py
+++ b/var/spack/repos/builtin/packages/py-iminuit/package.py
@@ -11,9 +11,11 @@ class PyIminuit(PythonPackage):
 
     pypi = "iminuit/iminuit-1.2.tar.gz"
 
+    version('1.3.7', sha256='9173e52cc4a0c0bda13ebfb862f9b074dc5de345b23cb15c1150863aafd8a26c')
     version('1.3.6', sha256='d79a197f305d4708a0e3e52b0a6748c1a6997360d2fbdfd09c022995a6963b5e')
     version('1.2', sha256='7651105fc3f186cfb5742f075ffebcc5088bf7797d8ed124c00977eebe0d1c64')
 
     # Required dependencies
     depends_on('py-setuptools', type='build')
-    depends_on('py-numpy', type=('build', 'run'), when='@1.3:')
+    depends_on('py-numpy', type=('build', 'run'), when='@1.3:1.3.6')
+    depends_on('py-numpy@1.11.3:', type=('build', 'run'), when='@1.3.7:')