diff --git a/requirements.txt b/requirements.txt
index b524b16e482aeb91976cba7795b9ece4014f21eb..ec3000840c36c57ca0e2e46a966b01746ba06643 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ future
 numpy
 cython
 Pint==0.7.2
-ase==3.14.0
+ase==3.15.0
 setuptools
 scipy
 mdtraj==1.9.1