diff --git a/spcd/bootstrap.sh b/spcd/bootstrap.sh
index d78577b..f55eae8 100644
--- a/spcd/bootstrap.sh
+++ b/spcd/bootstrap.sh
@@ -163,15 +163,15 @@ SPCD_ERROR_OS=2
 # │ internal │ frame │
 # ╰──────────┴───────╯
 
-SPCD_FRAME_TOP="╭╴"
-SPCD_FRAME_BOTTOM="╰╴"
+_SPCD_FRAME_TOP="╭╴"
+_SPCD_FRAME_BOTTOM="╰╴"
 
-spcd_frame_open() {
-    echo "${SPCD_FRAME_TOP}${1}"
+_spcd_frame_open() {
+    echo "${_SPCD_FRAME_TOP}${1}"
 }
 
-spcd_frame_shut() {
-    echo "${SPCD_FRAME_BOTTOM}${1}"
+_spcd_frame_shut() {
+    echo "${_SPCD_FRAME_BOTTOM}${1}"
 }
 
 # ╭──────────┬────╮
@@ -181,9 +181,9 @@ spcd_frame_shut() {
 spcd_os_cat() {
     spcd_cat__file="${1}"
     if [ -n "${spcd_cat__file}" ]; then
-        spcd_frame_open "${spcd_cat__file}"
+        _spcd_frame_open "${spcd_cat__file}"
         cat "${spcd_cat__file}"
-        spcd_frame_shut "${spcd_cat__file}"
+        _spcd_frame_shut "${spcd_cat__file}"
     fi
 }
 
@@ -277,9 +277,9 @@ spcd_os_grep() {
 spcd_os_ls() {
     spcd_os_ls__path="${1}"
     if [ -n "${spcd_os_ls__path}" ]; then
-        spcd_frame_open "${spcd_os_ls__path}"
+        _spcd_frame_open "${spcd_os_ls__path}"
         ls -a -l "${spcd_os_ls__path}"
-        spcd_frame_shut "${spcd_os_ls__path}"
+        _spcd_frame_shut "${spcd_os_ls__path}"
     fi
 }