diff --git a/main.sh b/main.sh
index 92533f4..16a9d80 100755
--- a/main.sh
+++ b/main.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 set -euo pipefail
 IFS=$'\n\t'
 
diff --git a/post.sh b/post.sh
index 325f8e1..339ca05 100755
--- a/post.sh
+++ b/post.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 set -euo pipefail
 IFS=$'\n\t'