diff --git a/documentation/pvaClientCPP.html b/documentation/pvaClientCPP.html
index 20ee501..dccee86 100644
--- a/documentation/pvaClientCPP.html
+++ b/documentation/pvaClientCPP.html
@@ -26,7 +26,7 @@
 
 <div class="head">
 <h1>EPICS pvaClientCPP</h1>
-<h2 class="nocount">Release 4.2.0-SNAPSHOT - 2016-07-14</h2>
+<h2 class="nocount">Release 4.2.1 - 2016-08-26</h2>
 
 <h2 class="nocount">Abstract</h2>
 
diff --git a/src/Makefile b/src/Makefile
index 7e945c7..6acd5e3 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -6,7 +6,7 @@ include $(TOP)/configure/CONFIG
 LIBRARY += pvaClient
 
 # shared library ABI version.
-SHRLIB_VERSION ?= 4.2.0
+SHRLIB_VERSION ?= 4.2
 
 INC += pv/pvaClient.h
 INC += pv/pvaClientMultiChannel.h