diff --git a/SegmentTree.cabal b/SegmentTree.cabal
--- a/SegmentTree.cabal
+++ b/SegmentTree.cabal
@@ -1,5 +1,5 @@
 Name:    SegmentTree
-Version: 0.2
+Version: 0.3
 License: BSD3
 License-File: LICENSE
 Author: Dmitry Astapov <dastapov@gmail.com>
diff --git a/src/Data/SegmentTree.hs b/src/Data/SegmentTree.hs
--- a/src/Data/SegmentTree.hs
+++ b/src/Data/SegmentTree.hs
@@ -24,7 +24,7 @@
 -- referring to the number of intervals.
 -----------------------------------------------------------------------------
 
-module Data.SegmentTree ( STree(..), fromList, insert, queryTree, countingQuery, stabbingQuery ) where
+module Data.SegmentTree ( R(..), Interval(..), Boundary(..), STree(..), fromList, insert, queryTree, countingQuery, stabbingQuery ) where
 
 import Data.SegmentTree.Interval
 import Data.SegmentTree.Measured