diff --git a/bootstrap.sh b/bootstrap.sh
index 819db99..3f26580 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -3,14 +3,16 @@
 # Copyright (c) 2017, deadc0de6
 
 fold="dotfiles"
+conf="config.yaml"
 
 # copy dotdrop entry point
 cat dotdrop/dotdrop.sh | sed 's#${cur}/dotdrop/dotdrop.py#${cur}/dotdrop/dotdrop/dotdrop.py#g' > dotdrop.sh
 chmod +x dotdrop.sh
 mkdir $fold
 
-# init config file
-cat << EOF > config.yaml
+if [ ! -e ${conf} ]; then
+  # init config file
+  cat << EOF > ${conf}
 config:
   backup: true
   create: true
@@ -18,3 +20,4 @@ config:
 dotfiles:
 profiles:
 EOF
+fi