diff --git a/tools/build/envDefaults b/tools/build/envDefaults
index dc73b94..11e8962 100644
--- a/tools/build/envDefaults
+++ b/tools/build/envDefaults
@@ -18,8 +18,8 @@
 export BUILD_NUMBER=${BUILD_NUMBER:-$(id -un)}
 
 # ONOS Version and onos.tar.gz staging environment
-export ONOS_POM_VERSION="1.9.0"
-export ONOS_VERSION=${ONOS_VERSION:-1.9.0.$BUILD_NUMBER}
+export ONOS_POM_VERSION="1.9.1-SNAPSHOT"
+export ONOS_VERSION=${ONOS_VERSION:-1.9.1.$BUILD_NUMBER}
 
 # ONOS production bits (onos.tar.gz, onos.zip, onos.deb, onos.rpm) staging environment
 export ONOS_BITS=onos-${ONOS_VERSION%~*}
diff --git a/tools/build/onos-prepare-sonar b/tools/build/onos-prepare-sonar
index 455a9c8..680e33e 100755
--- a/tools/build/onos-prepare-sonar
+++ b/tools/build/onos-prepare-sonar
@@ -12,7 +12,7 @@
 from subprocess import call, check_call, check_output
 
 # FIXME pull the version from the Buck version file
-ONOS_VERSION='1.9.0'
+ONOS_VERSION='1.9.1-SNAPSHOT'
 
 # SonarQube property file name and template
 FILE_NAME = 'sonar-project.properties'