diff --git a/requirements.txt b/requirements.txt
index b1e6e8b..75c07a6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 cython
-numpy 
+numpy
 matplotlib
 scipy
 tqdm
@@ -10,4 +10,5 @@ sphinx_rtd_theme
 coverage
 coveralls
 pillow
-pandas
\ No newline at end of file
+pandas
+pyyaml