diff --git a/CONTRIBUTIONS.txt b/CONTRIBUTIONS.txt
index d6d2793..6435fc1 100644
--- a/CONTRIBUTIONS.txt
+++ b/CONTRIBUTIONS.txt
@@ -5,6 +5,7 @@
 * Introduced ValueType abstraction (Dirk Riehle, Wolf Siberski)
 * Added DateType, NameType, and QuantityUnitType abstractions (Dirk Riehle, Wolf Siberski)
 * Added Restrictions, SimpleValueType, etc. (Dirk Riehle, Wolf Siberski)
+* Added BooleanRestrictions (Dirk Riehle, Wolf Siberski)
 
 == JValue 0.7 (released) ==