diff --git a/prep-target b/prep-target
index 63308de1..44f4984b 100755
--- a/prep-target
+++ b/prep-target
@@ -114,6 +114,10 @@ git_clone $REQUIREMENTS_REPO $REQUIREMENTS_DIR $REQUIREMENTS_BRANCH
 
 install_infra
 
+# force any oslo upgrades that might be required
+source $TARGET_DEVSTACK_DIR/lib/oslo
+install_oslo
+
 # Start helper services
 # =====================