diff --git a/Dockerfile b/Dockerfile
index 114865e..3ed9f10 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,7 +10,7 @@ RUN git clone --recurse-submodules https://github.com/cloudreve/Cloudreve.git
 # build frontend
 WORKDIR /cloudreve_builder/Cloudreve/assets
 RUN yarn install --network-timeout 1000000
-RUN yarn run build && rm -rf build/*.map
+RUN yarn run build && find . -name "*.map" -type f -delete
 
 # build backend
 WORKDIR /cloudreve_builder/Cloudreve
diff --git a/build.sh b/build.sh
index f130e65..3e4f282 100755
--- a/build.sh
+++ b/build.sh
@@ -30,7 +30,7 @@ buildAssets() {
   yarn install
   yarn run build
   cd build
-  rm -rf *.map
+  find . -name "*.map" -type f -delete
   cd $REPO
   zip -r - assets/build >assets.zip
 }