diff --git a/Makefile b/Makefile
index bd363611..e728c713 100644
--- a/Makefile
+++ b/Makefile
@@ -32,7 +32,7 @@ TESTS_DIR = test
 
 MAJOR_VERSION = 2
 MINOR_VERSION = 4
-PATCH_LEVEL = 1
+PATCH_LEVEL = 2
 
 CC = gcc
 LD = gcc
diff --git a/doc/src/conf.py b/doc/src/conf.py
index 9276e456..f95e8081 100755
--- a/doc/src/conf.py
+++ b/doc/src/conf.py
@@ -33,7 +33,7 @@
 version = '2.4'
 
 # the full version, including alpha/beta/rc tags
-release = '2.4.1'
+release = '2.4.2'
 
 # the theme to use for HTML pages
 html_theme = 'oracle'
diff --git a/doc/src/releasenotes.rst b/doc/src/releasenotes.rst
index d9e848f0..49938620 100644
--- a/doc/src/releasenotes.rst
+++ b/doc/src/releasenotes.rst
@@ -1,6 +1,15 @@
 ODPI-C Release notes
 ====================
 
+Version 2.4.2 (July 9, 2018)
+----------------------------
+
+#)  Avoid buffer overrun due to improper calculation of length byte when
+    converting some negative 39 digit numbers from string to the internal
+    Oracle number format
+    (`issue 67 <https://github.com/oracle/odpi/issues/67>`__).
+
+
 Version 2.4.1 (July 2, 2018)
 ----------------------------
 
diff --git a/include/dpi.h b/include/dpi.h
index ff96adca..ba09c1f4 100644
--- a/include/dpi.h
+++ b/include/dpi.h
@@ -45,7 +45,7 @@
 // define ODPI-C version information
 #define DPI_MAJOR_VERSION   2
 #define DPI_MINOR_VERSION   4
-#define DPI_PATCH_LEVEL     1
+#define DPI_PATCH_LEVEL     2
 #define DPI_VERSION_SUFFIX
 
 #define DPI_STR_HELPER(x)       #x