diff --git a/hlna-git/postinstall.sh b/hlna-git/postinstall.sh
index f6a4df5..60a5f00 100755
--- a/hlna-git/postinstall.sh
+++ b/hlna-git/postinstall.sh
@@ -1,15 +1,14 @@
 if test -f ~/.zshrc; then
 cd ~/
-sed -i -e '$aalias hlna="hlna.py"' .zshrc
-sed -i -e '$a alias hlna-bot="hlna-bot.py"' .zshrc
-source ~/.zshrc
+echo 'alias hlna="hlna.py"' >> .zshrc
+echo 'alias hlna-bot="hlna-bot.py"' >> .zshrc
 elif test -f ~/.config/fish/config.fish; then
-sed -i -e '$alias hlna="hlna.py"' ~/.config/fish/config.fish
-sed -i -e '$alias hlna-bot="hlna-bot.py"' ~/.config/fish/config.fish
+sed -i '$alias hlna="hlna.py"' ~/.config/fish/config.fish
+sed -i '$alias hlna-bot="hlna-bot.py"' ~/.config/fish/config.fish
 source ~/.config/fish/config.fish
 else
 cd ~/
-sed -i -e '$aalias hlna="hlna.py"' .bashrc
-sed -i -e '$aalias hlna-bot="hlna-bot.py"' .bashrc
+sed -i '$aalias hlna="hlna.py"' .bashrc
+sed -i '$aalias hlna-bot="hlna-bot.py"' .bashrc
 source ~/.bashrc
 fi