diff --git a/CHANGELOG.md b/CHANGELOG.md
index 99eace8..a4ac174 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,8 @@
-1.4.0 (unreleased)
+1.21.0
 
+* Version numbering change. Future versions will be labled X.Y.Z where X is the major version, Y is the Aurora version the library has been tested against (e.g. 21 -> 0.21.0), and X is the minor revision.
 * Moved to Thrift 0.12.0 code generator and go library.
 * `aurora.ACTIVE_STATES`, `aurora.SLAVE_ASSIGNED_STATES`, `aurora.LIVE_STATES`, `aurora.TERMINAL_STATES`, `aurora.ACTIVE_JOB_UPDATE_STATES`, `aurora.AWAITNG_PULSE_JOB_UPDATE_STATES` are all now generated as a slices.
 * Please use `realis.ActiveStates`, `realis.SlaveAssignedStates`,`realis.LiveStates`, `realis.TerminalStates`, `realis.ActiveJobUpdateStates`, `realis.AwaitingPulseJobUpdateStates` in their places when map representations are needed.
 * `GetInstanceIds(key *aurora.JobKey, states map[aurora.ScheduleStatus]bool) (map[int32]bool, error)` has changed signature to ` GetInstanceIds(key *aurora.JobKey, states []aurora.ScheduleStatus) ([]int32, error)`
+* Adding support for GPU as resource.
\ No newline at end of file
diff --git a/realis.go b/realis.go
index 1e568f3..0b06c07 100644
--- a/realis.go
+++ b/realis.go
@@ -37,7 +37,7 @@ import (
 	"github.com/pkg/errors"
 )
 
-const VERSION = "1.4.0"
+const VERSION = "1.21.0"
 
 // TODO(rdelvalle): Move documentation to interface in order to make godoc look better/more accessible
 type Realis interface {