diff --git a/broker/src/main/kotlin/dev/usbharu/owl/broker/service/RetryPolicy.kt b/broker/src/main/kotlin/dev/usbharu/owl/broker/service/RetryPolicy.kt
deleted file mode 100644
index fb4c667..0000000
--- a/broker/src/main/kotlin/dev/usbharu/owl/broker/service/RetryPolicy.kt
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * Copyright (C) 2024 usbharu
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package dev.usbharu.owl.broker.service
-
-import java.time.Instant
-import kotlin.math.pow
-import kotlin.math.roundToLong
-
-interface RetryPolicy {
-    fun nextRetry(now: Instant, attempt: Int): Instant
-}
-
-class ExponentialRetryPolicy(private val firstRetrySeconds: Int = 30) : RetryPolicy {
-    override fun nextRetry(now: Instant, attempt: Int): Instant =
-        now.plusSeconds(firstRetrySeconds.toDouble().pow(attempt + 1.0).roundToLong())
-
-}
\ No newline at end of file
diff --git a/broker/src/main/kotlin/dev/usbharu/owl/broker/service/RetryPolicyFactory.kt b/broker/src/main/kotlin/dev/usbharu/owl/broker/service/RetryPolicyFactory.kt
index 86ad27b..3b4d851 100644
--- a/broker/src/main/kotlin/dev/usbharu/owl/broker/service/RetryPolicyFactory.kt
+++ b/broker/src/main/kotlin/dev/usbharu/owl/broker/service/RetryPolicyFactory.kt
@@ -16,8 +16,11 @@
 
 package dev.usbharu.owl.broker.service
 
+import dev.usbharu.owl.common.retry.ExponentialRetryPolicy
+import dev.usbharu.owl.common.retry.RetryPolicy
+
 interface RetryPolicyFactory {
-    fun factory(name:String):RetryPolicy
+    fun factory(name: String): RetryPolicy
 }
 
 class DefaultRetryPolicyFactory(private val map: Map<String,RetryPolicy>) : RetryPolicyFactory {
diff --git a/common/src/main/kotlin/dev/usbharu/owl/common/retry/ExponentialRetryPolicy.kt b/common/src/main/kotlin/dev/usbharu/owl/common/retry/ExponentialRetryPolicy.kt
new file mode 100644
index 0000000..60180dd
--- /dev/null
+++ b/common/src/main/kotlin/dev/usbharu/owl/common/retry/ExponentialRetryPolicy.kt
@@ -0,0 +1,11 @@
+package dev.usbharu.owl.common.retry
+
+import java.time.Instant
+import kotlin.math.pow
+import kotlin.math.roundToLong
+
+class ExponentialRetryPolicy(private val firstRetrySeconds: Int = 30) : RetryPolicy {
+    override fun nextRetry(now: Instant, attempt: Int): Instant =
+        now.plusSeconds(firstRetrySeconds.toDouble().pow(attempt + 1.0).roundToLong())
+
+}
\ No newline at end of file
diff --git a/common/src/main/kotlin/dev/usbharu/owl/common/retry/RetryPolicy.kt b/common/src/main/kotlin/dev/usbharu/owl/common/retry/RetryPolicy.kt
index 9042917..04a73a0 100644
--- a/common/src/main/kotlin/dev/usbharu/owl/common/retry/RetryPolicy.kt
+++ b/common/src/main/kotlin/dev/usbharu/owl/common/retry/RetryPolicy.kt
@@ -16,5 +16,8 @@
 
 package dev.usbharu.owl.common.retry
 
+import java.time.Instant
+
 interface RetryPolicy {
+    fun nextRetry(now: Instant, attempt: Int): Instant
 }
\ No newline at end of file