diff --git a/rvos/requirements.txt b/rvos/requirements.txt
index 2eb8c7f..346d91a 100644
--- a/rvos/requirements.txt
+++ b/rvos/requirements.txt
@@ -1,6 +1,6 @@
 numpy==1.15.1
 scipy==0.19.0
-pillow==4.0.0
+pillow==6.2.0
 matplotlib==2.0.0
 h5py==2.7.0
 cython==0.25.2