diff --git a/fedmsg.spec b/fedmsg.spec
index 5fb4058..4bb99c5 100644
--- a/fedmsg.spec
+++ b/fedmsg.spec
@@ -37,6 +37,7 @@ BuildRequires:  python-pygments
 BuildRequires:  python-fabulous
 BuildRequires:  python-fedora
 BuildRequires:  python-psutil
+BuildRequires:  python-arrow
 
 %if 0%{?rhel} && 0%{?rhel} <= 6
 # On rhel, we don't need systemd to build.  but we do on fedora.
@@ -55,6 +56,7 @@ Requires:       python-pygments
 Requires:       python-fabulous
 Requires:       python-fedora
 Requires:       python-psutil
+Requires:       python-arrow
 
 %if 0%{?rhel} && 0%{?rhel} <= 6
 BuildRequires:  python-ordereddict