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-rw-r--r--var/spack/repos/builtin/packages/py-espressopp/package.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/var/spack/repos/builtin/packages/py-espressopp/package.py b/var/spack/repos/builtin/packages/py-espressopp/package.py
index a4524da78e..779873bc98 100644
--- a/var/spack/repos/builtin/packages/py-espressopp/package.py
+++ b/var/spack/repos/builtin/packages/py-espressopp/package.py
@@ -35,7 +35,7 @@ class PyEspressopp(CMakePackage):
depends_on("fftw")
depends_on("py-sphinx", when="+ug", type='build')
depends_on("py-sphinx", when="+pdf", type='build')
- depends_on('py-numpy', type=('build', 'run'))
+ depends_on('py-numpy@:1.16.6', type=('build', 'run'))
depends_on('py-matplotlib', when="+ug", type='build')
depends_on('py-matplotlib', when="+pdf", type='build')
depends_on("texlive", when="+pdf", type='build')