diff --git a/build/requirements.txt b/build/requirements.txt
index 5e9bbe3..975322b 100644
--- a/build/requirements.txt
+++ b/build/requirements.txt
@@ -1,5 +1,5 @@
 alabaster==0.7.12
-arrow==0.13.1
+arrow==0.15.1
 asn1crypto==0.24.0
 atomicwrites==1.3.0
 attrs==19.1.0