diff --git a/scripts/imgtool/__init__.py b/scripts/imgtool/__init__.py
index 8f6e848..804f0d6 100644
--- a/scripts/imgtool/__init__.py
+++ b/scripts/imgtool/__init__.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-imgtool_version = "1.4.0a3"
+imgtool_version = "1.4.0rc2"