diff --git a/ci/rpmostree.sh b/ci/rpmostree.sh
index 0d8a5e41..421aca38 100755
--- a/ci/rpmostree.sh
+++ b/ci/rpmostree.sh
@@ -6,7 +6,7 @@ set -xeuo pipefail
 # Frozen to a tag for now to help predictability; it's
 # also useful to test building *older* versions since
 # that must work.
-RPMOSTREE_TAG=v2018.7
+RPMOSTREE_TAG=v2018.8
 
 dn=$(dirname $0)
 . ${dn}/libpaprci/libbuild.sh