diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a0c96cc6..5bc9b3de 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,6 +4,10 @@ on:
     types: [opened, synchronize, reopened]
   workflow_dispatch:
 
+concurrency: 
+  group: ${{ github.workflow }}-${{ github.head_ref }}
+  cancel-in-progress: true
+
 jobs:
 
   install-dep:
diff --git a/android/src/main/java/com/jimmydaddy/imagemarker/ImageMarkerManager.kt b/android/src/main/java/com/jimmydaddy/imagemarker/ImageMarkerManager.kt
index 22c13797..d68687d9 100644
--- a/android/src/main/java/com/jimmydaddy/imagemarker/ImageMarkerManager.kt
+++ b/android/src/main/java/com/jimmydaddy/imagemarker/ImageMarkerManager.kt
@@ -284,7 +284,7 @@ class ImageMarkerManager(private val context: ReactApplicationContext) : ReactCo
     return if (null != filename) {
       if (filename.endsWith(".jpg") || filename.endsWith(".png")) "$cacheDir/$filename" else "$cacheDir/$filename$ext"
     } else {
-      val name = UUID.randomUUID().toString() + "image marker"
+      val name = UUID.randomUUID().toString() + "_image_marker"
       "$cacheDir/$name$ext"
     }
   }