diff --git a/requirements-optional.txt b/requirements-optional.txt
index 65e8eaba..1eb219eb 100644
--- a/requirements-optional.txt
+++ b/requirements-optional.txt
@@ -7,4 +7,4 @@ pytest-cov
 pytest-xdist
 pytest-sugar
 scripttest
-python-coveralls
\ No newline at end of file
+python-coveralls
diff --git a/requirements.txt b/requirements.txt
index e7fe5c65..db895fb9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,5 +10,4 @@ ipython
 nbformat
 matplotlib
 seaborn
-pymatgen
-abipy
+abipy>=0.7