diff --git a/gradle.properties b/gradle.properties
index 23ec90a0..b0a80e77 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,4 +1,5 @@
 # Universal AppleCommander version number.  Used for:
 # - Naming JAR file.  
 # - The build will insert this into a file that is read at run time as well.
-version=12.0
+# - Use SNAPSHOT for development and remove for a release.
+version=13.0-SNAPSHOT