diff --git a/src/script.sh b/src/script.sh
index 696552c..b90f500 100644
--- a/src/script.sh
+++ b/src/script.sh
@@ -1,14 +1,19 @@
 #!/bin/sh
 
-## dash does not support pipefail
+# dash does not support pipefail
 # this does not work in `dash script.sh`
-DASH=$(readlink -f "/bin/sh" | grep "dash" || [ $? = 1 ])
-if [ -n "$DASH" ]; then
+IS_DASH=$(readlink -f "/bin/sh" | grep "dash" || [ $? = 1 ])
+if [ -n "$IS_DASH" ]; then
   set -efx
 else
   set -efx -o pipefail
 fi
 
+# bash does not expand alias by default for non-interactive script
+if [ -n "$BASH_VERSION" ]; then
+  shopt -s expand_aliases
+fi
+
 alias curl="curl -L"
 alias mkdir="mkdir -p"
 alias rm="rm -rf"