diff --git a/.github/workflows/compile.yml b/.github/workflows/compile.yml
index fa19e82..96eb525 100644
--- a/.github/workflows/compile.yml
+++ b/.github/workflows/compile.yml
@@ -30,8 +30,9 @@ jobs:
         - macOS-11
         - macOS-12
         go:
-        - 1.18
-        - 1.19
+        - '^1.18'
+        - '^1.19'
+        - '^1.20'
     steps:
       - name: Check out repository code
         uses: actions/checkout@v3
diff --git a/example/gui-linux/go.mod b/example/gui-linux/go.mod
index 53365d7..38020f8 100644
--- a/example/gui-linux/go.mod
+++ b/example/gui-linux/go.mod
@@ -10,6 +10,7 @@ require (
 )
 
 require (
+	github.com/Code-Hex/go-infinity-channel v1.0.0 // indirect
 	github.com/mattn/go-isatty v0.0.14 // indirect
 	golang.org/x/mod v0.6.0 // indirect
 	golang.org/x/sys v0.1.0 // indirect
diff --git a/example/gui-linux/go.sum b/example/gui-linux/go.sum
index f99ccc1..3ad1b51 100644
--- a/example/gui-linux/go.sum
+++ b/example/gui-linux/go.sum
@@ -1,3 +1,5 @@
+github.com/Code-Hex/go-infinity-channel v1.0.0 h1:M8BWlfDOxq9or9yvF9+YkceoTkDI1pFAqvnP87Zh0Nw=
+github.com/Code-Hex/go-infinity-channel v1.0.0/go.mod h1:5yUVg/Fqao9dAjcpzoQ33WwfdMWmISOrQloDRn3bsvY=
 github.com/Songmu/prompter v0.5.1 h1:IAsttKsOZWSDw7bV1mtGn9TAmLFAjXbp9I/eYmUUogo=
 github.com/Songmu/prompter v0.5.1/go.mod h1:CS3jEPD6h9IaLaG6afrl1orTgII9+uDWuw95dr6xHSw=
 github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
diff --git a/example/linux/go.mod b/example/linux/go.mod
index ae31b37..88d45df 100644
--- a/example/linux/go.mod
+++ b/example/linux/go.mod
@@ -10,4 +10,7 @@ require (
 	golang.org/x/sys v0.1.0
 )
 
-require golang.org/x/mod v0.6.0 // indirect
+require (
+	github.com/Code-Hex/go-infinity-channel v1.0.0 // indirect
+	golang.org/x/mod v0.6.0 // indirect
+)
diff --git a/example/linux/go.sum b/example/linux/go.sum
index cae5519..f062a35 100644
--- a/example/linux/go.sum
+++ b/example/linux/go.sum
@@ -1,3 +1,5 @@
+github.com/Code-Hex/go-infinity-channel v1.0.0 h1:M8BWlfDOxq9or9yvF9+YkceoTkDI1pFAqvnP87Zh0Nw=
+github.com/Code-Hex/go-infinity-channel v1.0.0/go.mod h1:5yUVg/Fqao9dAjcpzoQ33WwfdMWmISOrQloDRn3bsvY=
 github.com/pkg/term v1.1.0 h1:xIAAdCMh3QIAy+5FrE8Ad8XoDhEU4ufwbaSozViP9kk=
 github.com/pkg/term v1.1.0/go.mod h1:E25nymQcrSllhX42Ok8MRm1+hyBdHY0dCeiKZ9jpNGw=
 golang.org/x/crypto v0.1.0 h1:MDRAIl0xIo9Io2xV565hzXHw3zVseKrJKodhohM5CjU=
diff --git a/example/macOS/go.mod b/example/macOS/go.mod
index d2696cb..e6cf175 100644
--- a/example/macOS/go.mod
+++ b/example/macOS/go.mod
@@ -6,4 +6,7 @@ replace github.com/Code-Hex/vz/v3 => ../../
 
 require github.com/Code-Hex/vz/v3 v3.0.0-00010101000000-000000000000
 
-require golang.org/x/mod v0.6.0 // indirect
+require (
+	github.com/Code-Hex/go-infinity-channel v1.0.0 // indirect
+	golang.org/x/mod v0.6.0 // indirect
+)
diff --git a/example/macOS/go.sum b/example/macOS/go.sum
index e023a39..c24632f 100644
--- a/example/macOS/go.sum
+++ b/example/macOS/go.sum
@@ -1,3 +1,5 @@
+github.com/Code-Hex/go-infinity-channel v1.0.0 h1:M8BWlfDOxq9or9yvF9+YkceoTkDI1pFAqvnP87Zh0Nw=
+github.com/Code-Hex/go-infinity-channel v1.0.0/go.mod h1:5yUVg/Fqao9dAjcpzoQ33WwfdMWmISOrQloDRn3bsvY=
 golang.org/x/crypto v0.1.0 h1:MDRAIl0xIo9Io2xV565hzXHw3zVseKrJKodhohM5CjU=
 golang.org/x/mod v0.6.0 h1:b9gGHsz9/HhJ3HF5DHQytPpuwocVTChQJK3AvoLRD5I=
 golang.org/x/mod v0.6.0/go.mod h1:4mET923SAdbXp2ki8ey+zGs1SLqsuM2Y0uvdZR/fUNI=
diff --git a/go.mod b/go.mod
index cbbd1b9..661bde9 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,7 @@ module github.com/Code-Hex/vz/v3
 go 1.19
 
 require (
+	github.com/Code-Hex/go-infinity-channel v1.0.0
 	golang.org/x/crypto v0.1.0
 	golang.org/x/mod v0.6.0
 )
diff --git a/go.sum b/go.sum
index be7c91f..04a6d08 100644
--- a/go.sum
+++ b/go.sum
@@ -1,3 +1,5 @@
+github.com/Code-Hex/go-infinity-channel v1.0.0 h1:M8BWlfDOxq9or9yvF9+YkceoTkDI1pFAqvnP87Zh0Nw=
+github.com/Code-Hex/go-infinity-channel v1.0.0/go.mod h1:5yUVg/Fqao9dAjcpzoQ33WwfdMWmISOrQloDRn3bsvY=
 golang.org/x/crypto v0.1.0 h1:MDRAIl0xIo9Io2xV565hzXHw3zVseKrJKodhohM5CjU=
 golang.org/x/crypto v0.1.0/go.mod h1:RecgLatLF4+eUMCP1PoPZQb+cVrJcOPbHkTkbkB9sbw=
 golang.org/x/mod v0.6.0 h1:b9gGHsz9/HhJ3HF5DHQytPpuwocVTChQJK3AvoLRD5I=
diff --git a/virtualization.go b/virtualization.go
index 4091c77..0cb9d61 100644
--- a/virtualization.go
+++ b/virtualization.go
@@ -13,6 +13,7 @@ import (
 	"sync"
 	"unsafe"
 
+	infinity "github.com/Code-Hex/go-infinity-channel"
 	"github.com/Code-Hex/vz/v3/internal/objc"
 )
 
@@ -81,7 +82,7 @@ type VirtualMachine struct {
 
 type machineState struct {
 	state       VirtualMachineState
-	stateNotify chan VirtualMachineState
+	stateNotify *infinity.Channel[VirtualMachineState]
 
 	mu sync.RWMutex
 }
@@ -104,7 +105,7 @@ func NewVirtualMachine(config *VirtualMachineConfiguration) (*VirtualMachine, er
 
 	stateHandle := cgo.NewHandle(&machineState{
 		state:       VirtualMachineState(0),
-		stateNotify: make(chan VirtualMachineState),
+		stateNotify: infinity.NewChannel[VirtualMachineState](),
 	})
 
 	v := &VirtualMachine{
@@ -160,8 +161,7 @@ func changeStateOnObserver(newStateRaw C.int, cgoHandlerPtr unsafe.Pointer) {
 	v.mu.Lock()
 	newState := VirtualMachineState(newStateRaw)
 	v.state = newState
-	// for non-blocking
-	go func() { v.stateNotify <- newState }()
+	v.stateNotify.In() <- newState
 	v.mu.Unlock()
 }
 
@@ -188,7 +188,7 @@ func (v *VirtualMachine) StateChangedNotify() <-chan VirtualMachineState {
 	val, _ := v.stateHandle.Value().(*machineState)
 	val.mu.RLock()
 	defer val.mu.RUnlock()
-	return val.stateNotify
+	return val.stateNotify.Out()
 }
 
 // CanStart returns true if the machine is in a state that can be started.