diff --git a/circuitbreaker/sre/sre.go b/circuitbreaker/sre/sre.go
index 7c71be8..64c0caa 100644
--- a/circuitbreaker/sre/sre.go
+++ b/circuitbreaker/sre/sre.go
@@ -8,7 +8,7 @@ import (
 	"time"
 
 	"github.com/go-kratos/aegis/circuitbreaker"
-	"github.com/go-kratos/aegis/pkg/window"
+	"github.com/go-kratos/aegis/internal/window"
 )
 
 // Option is sre breaker option function.
diff --git a/circuitbreaker/sre/sre_test.go b/circuitbreaker/sre/sre_test.go
index b021828..28d6c9f 100644
--- a/circuitbreaker/sre/sre_test.go
+++ b/circuitbreaker/sre/sre_test.go
@@ -6,7 +6,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-kratos/aegis/pkg/window"
+	"github.com/go-kratos/aegis/internal/window"
 	"github.com/stretchr/testify/assert"
 )
 
diff --git a/consistent/consistent.go b/internal/consistent/consistent.go
similarity index 100%
rename from consistent/consistent.go
rename to internal/consistent/consistent.go
diff --git a/consistent/consistent_test.go b/internal/consistent/consistent_test.go
similarity index 100%
rename from consistent/consistent_test.go
rename to internal/consistent/consistent_test.go
diff --git a/pkg/cpu/cgroup.go b/internal/cpu/cgroup.go
similarity index 100%
rename from pkg/cpu/cgroup.go
rename to internal/cpu/cgroup.go
diff --git a/pkg/cpu/cgroup_cpu.go b/internal/cpu/cgroup_cpu.go
similarity index 100%
rename from pkg/cpu/cgroup_cpu.go
rename to internal/cpu/cgroup_cpu.go
diff --git a/pkg/cpu/psutil_cpu.go b/internal/cpu/psutil_cpu.go
similarity index 100%
rename from pkg/cpu/psutil_cpu.go
rename to internal/cpu/psutil_cpu.go
diff --git a/pkg/cpu/stat.go b/internal/cpu/stat.go
similarity index 100%
rename from pkg/cpu/stat.go
rename to internal/cpu/stat.go
diff --git a/pkg/cpu/stat_test.go b/internal/cpu/stat_test.go
similarity index 89%
rename from pkg/cpu/stat_test.go
rename to internal/cpu/stat_test.go
index ed27830..9069c38 100644
--- a/pkg/cpu/stat_test.go
+++ b/internal/cpu/stat_test.go
@@ -8,7 +8,8 @@ import (
 )
 
 func TestStat(t *testing.T) {
-	time.Sleep(time.Second * 2)
+	time.Sleep(time.Second * 3)
+
 	var s Stat
 	var i Info
 	ReadStat(&s)
diff --git a/pkg/cpu/utils.go b/internal/cpu/utils.go
similarity index 100%
rename from pkg/cpu/utils.go
rename to internal/cpu/utils.go
diff --git a/pkg/minheap/minheap.go b/internal/minheap/minheap.go
similarity index 100%
rename from pkg/minheap/minheap.go
rename to internal/minheap/minheap.go
diff --git a/pkg/window/counter.go b/internal/window/counter.go
similarity index 100%
rename from pkg/window/counter.go
rename to internal/window/counter.go
diff --git a/pkg/window/counter_test.go b/internal/window/counter_test.go
similarity index 100%
rename from pkg/window/counter_test.go
rename to internal/window/counter_test.go
diff --git a/pkg/window/iterator.go b/internal/window/iterator.go
similarity index 100%
rename from pkg/window/iterator.go
rename to internal/window/iterator.go
diff --git a/pkg/window/policy.go b/internal/window/policy.go
similarity index 100%
rename from pkg/window/policy.go
rename to internal/window/policy.go
diff --git a/pkg/window/policy_test.go b/internal/window/policy_test.go
similarity index 100%
rename from pkg/window/policy_test.go
rename to internal/window/policy_test.go
diff --git a/pkg/window/reduce.go b/internal/window/reduce.go
similarity index 100%
rename from pkg/window/reduce.go
rename to internal/window/reduce.go
diff --git a/pkg/window/window.go b/internal/window/window.go
similarity index 100%
rename from pkg/window/window.go
rename to internal/window/window.go
diff --git a/pkg/window/window_test.go b/internal/window/window_test.go
similarity index 100%
rename from pkg/window/window_test.go
rename to internal/window/window_test.go
diff --git a/ratelimit/bbr/bbr.go b/ratelimit/bbr/bbr.go
index c05ea43..2d76216 100644
--- a/ratelimit/bbr/bbr.go
+++ b/ratelimit/bbr/bbr.go
@@ -6,8 +6,8 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/go-kratos/aegis/pkg/cpu"
-	"github.com/go-kratos/aegis/pkg/window"
+	"github.com/go-kratos/aegis/internal/cpu"
+	"github.com/go-kratos/aegis/internal/window"
 	"github.com/go-kratos/aegis/ratelimit"
 )
 
diff --git a/ratelimit/bbr/bbr_test.go b/ratelimit/bbr/bbr_test.go
index 47ec712..13cf262 100644
--- a/ratelimit/bbr/bbr_test.go
+++ b/ratelimit/bbr/bbr_test.go
@@ -7,7 +7,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-kratos/aegis/pkg/window"
+	"github.com/go-kratos/aegis/internal/window"
 	"github.com/go-kratos/aegis/ratelimit"
 	"github.com/stretchr/testify/assert"
 )
diff --git a/subset/subset.go b/subset/subset.go
index 3f909ba..c582457 100644
--- a/subset/subset.go
+++ b/subset/subset.go
@@ -1,7 +1,7 @@
 package subset
 
 import (
-	"github.com/go-kratos/aegis/consistent"
+	"github.com/go-kratos/aegis/internal/consistent"
 )
 
 func Subset[M consistent.Member](selectKey string, inss []M, num int) []M {
diff --git a/subset/subset_test.go b/subset/subset_test.go
index 4a2af74..c1c2223 100644
--- a/subset/subset_test.go
+++ b/subset/subset_test.go
@@ -6,7 +6,7 @@ import (
 	"math/rand"
 	"testing"
 
-	"github.com/go-kratos/aegis/consistent"
+	"github.com/go-kratos/aegis/internal/consistent"
 	"github.com/google/uuid"
 	"github.com/stretchr/testify/assert"
 )
diff --git a/topk/heavykeeper.go b/topk/heavykeeper.go
index 54ac8a1..0042ea0 100644
--- a/topk/heavykeeper.go
+++ b/topk/heavykeeper.go
@@ -7,7 +7,7 @@ import (
 	"math"
 	"math/rand"
 
-	"github.com/go-kratos/aegis/pkg/minheap"
+	"github.com/go-kratos/aegis/internal/minheap"
 
 	"github.com/twmb/murmur3"
 )