diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 3eae184f..2b8dea81 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -279,6 +279,8 @@ tasks.register<Detekt>("detektAll") {
     val buildFiles = "**/build/**"
     exclude(resourceFiles, buildFiles)
     reports {
+        val buildDir = layout.buildDirectory
+
         xml.required.set(false)
         xml.outputLocation.set(file("$buildDir/reports/detekt/st-${name}.xml"))
 
@@ -292,4 +294,3 @@ tasks.register<Detekt>("detektAll") {
         sarif.outputLocation.set(file("$buildDir/reports/detekt/st-${name}.sarif"))
     }
 }
-
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostAttachment.kt b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostAttachment.kt
index f373ffd3..b1b5941d 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostAttachment.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostAttachment.kt
@@ -146,9 +146,9 @@ fun ActPost.addAttachment(
         return
     }
 
-    saveAttachmentList()
     val pa = PostAttachment(this)
     attachmentList.add(pa)
+    saveAttachmentList()
     showMediaAttachment()
 
     attachmentUploader.addRequest(
@@ -470,6 +470,7 @@ fun ActPost.rearrangeAttachments() = lifecycleScope.launch {
         // attachmentListを更新して表示し直す
         attachmentList.clear()
         attachmentList.addAll(newList)
+        saveAttachmentList()
         showMediaAttachment()
         showMediaAttachmentProgress()
     } catch (ex: Throwable) {
diff --git a/buildSrc/src/main/java/Vers.kt b/buildSrc/src/main/java/Vers.kt
index 2ecc73cd..6a067dd7 100644
--- a/buildSrc/src/main/java/Vers.kt
+++ b/buildSrc/src/main/java/Vers.kt
@@ -24,7 +24,7 @@ object Vers {
     const val koinVersion = "3.5.0"
     const val kotlinJvmTarget = "1.8"
     const val kotlinJvmToolchain = 17
-    const val kotlinTestVersion = "1.9.0"
+    const val kotlinTestVersion = "1.9.20"
     const val kotlinVersion = "1.9.20"
     const val kotlinxCoroutinesVersion = "1.7.3"
     const val kspVersion = "1.9.20-1.0.14"