diff --git a/bitmask/bitmask/requirements.txt b/bitmask/bitmask/requirements.txt
index 2958f4d..f53c297 100644
--- a/bitmask/bitmask/requirements.txt
+++ b/bitmask/bitmask/requirements.txt
@@ -1,4 +1,4 @@
-arrow==0.12.1
+arrow==0.15.1
 atomicwrites==1.2.1
 attrs==18.2.0
 base58==1.0.2