diff --git a/.zshrc b/.zshrc
index afcc1f1..0c0ccac 100644
--- a/.zshrc
+++ b/.zshrc
@@ -109,7 +109,7 @@ alias python="python3"
 alias pip3="python3 -m pip"
 alias pip="python -m pip"
 alias comp="cd ~/RustIsBestLang/src/bin && nvim"
-alias backup="git add . && git commit -m 'backup' && git push"
+alias backup="git add . && git commit -S -m 'backup' && git push"
 alias leetcode="nvim leetcode.nvim"
 export LD_LIBRARY_PATH=/usr/lib:/usr/local/cuda/lib65:$LD_LIBRARY_PATH
 export PATH=/usr/local/cuda/bin:$PATH