diff --git a/root/etc/cont-init.d/50-config b/root/etc/cont-init.d/50-config
index 05c4707..b11f30d 100644
--- a/root/etc/cont-init.d/50-config
+++ b/root/etc/cont-init.d/50-config
@@ -1,4 +1,5 @@
 #!/usr/bin/with-contenv bash
+# shellcheck shell=bash
 
 # permissions
 chown -R abc:abc \
diff --git a/root/etc/services.d/snapdrop-server/run b/root/etc/services.d/snapdrop-server/run
index 15a6b51..6404dfd 100644
--- a/root/etc/services.d/snapdrop-server/run
+++ b/root/etc/services.d/snapdrop-server/run
@@ -1,4 +1,5 @@
 #!/usr/bin/with-contenv bash
+# shellcheck shell=bash
 
 cd /app/www/server || exit 1
 
diff --git a/root/migrations/02-default-location b/root/migrations/02-default-location
index 3d3d2f8..595f4ae 100644
--- a/root/migrations/02-default-location
+++ b/root/migrations/02-default-location
@@ -1,10 +1,11 @@
 #!/usr/bin/with-contenv bash
+# shellcheck shell=bash
 
 DEFAULT_CONF="/config/nginx/site-confs/default.conf"
 OLD_ROOT="root /app/snapdrop/client;"
 NEW_ROOT="root /app/www/client;"
 
-if grep -q "${OLD_ROOT}" "${DEFAULT_CONF}";then
+if grep -q "${OLD_ROOT}" "${DEFAULT_CONF}"; then
     echo "updating root in ${DEFAULT_CONF}"
     sed -i "s|${OLD_ROOT}|${NEW_ROOT}|" "${DEFAULT_CONF}"
 fi