diff --git a/spring-webflow-samples/booking-jsf/ivy.xml b/spring-webflow-samples/booking-jsf/ivy.xml
index 7c644349..d3dbbb15 100755
--- a/spring-webflow-samples/booking-jsf/ivy.xml
+++ b/spring-webflow-samples/booking-jsf/ivy.xml
@@ -25,6 +25,8 @@
     <dependency org="jboss" name="jboss-el" rev="1.0"/>
 	<dependency org="org.hibernate" name="hibernate" rev="3.2.5.ga" />
 	<dependency org="org.hibernate" name="hibernate-entitymanager" rev="3.3.1.ga"/>
+	<!-- Required by "jboss archive browsing" which is used by hibernate-entity manager but not noted in their docs -->
+	<dependency org="concurrent" name="concurrent" rev="1.3.4" />	
 	<dependency org="org.hibernate" name="hibernate-commons-annotations" rev="3.3.0.ga"/>
 	<dependency org="javax.persistence" name="persistence-api" rev="1.0b"/>	
 	<dependency org="hsqldb" name="hsqldb" rev="1.8.0.7"/>
diff --git a/spring-webflow-samples/booking-mvc/ivy.xml b/spring-webflow-samples/booking-mvc/ivy.xml
index 8d016ad5..1c532171 100755
--- a/spring-webflow-samples/booking-mvc/ivy.xml
+++ b/spring-webflow-samples/booking-mvc/ivy.xml
@@ -27,6 +27,8 @@
     <dependency org="jboss" name="jboss-el" rev="1.0"/>
 	<dependency org="org.hibernate" name="hibernate" rev="3.2.5.ga" />
 	<dependency org="org.hibernate" name="hibernate-entitymanager" rev="3.3.1.ga"/>
+	<!-- Required by "jboss archive browsing" which is used by hibernate-entity manager but not noted in their docs -->
+	<dependency org="concurrent" name="concurrent" rev="1.3.4" />	
 	<dependency org="org.hibernate" name="hibernate-commons-annotations" rev="3.3.0.ga"/>
 	<dependency org="javax.persistence" name="persistence-api" rev="1.0b"/>	
 	<dependency org="hsqldb" name="hsqldb" rev="1.8.0.7"/>