diff --git a/ci/install-gst.sh b/ci/install-gst.sh
index 541754b25..e8ea00c4a 100755
--- a/ci/install-gst.sh
+++ b/ci/install-gst.sh
@@ -1,3 +1,5 @@
+#! /bin/bash
+
 set -e
 
 pip3 install meson==0.64.1
diff --git a/ci/install-rust.sh b/ci/install-rust.sh
index 2d21aec5d..10f6c682d 100755
--- a/ci/install-rust.sh
+++ b/ci/install-rust.sh
@@ -1,3 +1,5 @@
+#! /bin/bash
+
 source ./ci/env.sh
 
 set -e