diff --git a/bin/miaou-bash b/bin/miaou-bash
index 8134ce5..1c37231 100755
--- a/bin/miaou-bash
+++ b/bin/miaou-bash
@@ -3,42 +3,43 @@
 
 # constants
 
-MIAOU_DEBUG=${MIAOU_DEBUG:-false}
-MIAOU_ERROR_REGEX='^(.*): line ([0-9]+): miaou_error:'
-
-declare -A ANSI
-ANSI[RESET]=0
-
-ANSI[STYLE_ITALIC]=3
-ANSI[STYLE_BOLD]=1
-ANSI[STYLE_UNDERLINE]=4
-ANSI[STYLE_STRIKETHROUGH]=9
-
-ANSI[FG_BLACK]=30
-ANSI[FG_RED]=31
-ANSI[FG_GREEN]=32
-ANSI[FG_YELLOW]=33
-ANSI[FG_BLUE]=34
-ANSI[FG_PURPLE]=35
-ANSI[FG_CYAN]=36
-ANSI[FG_WHITE]=37
-ANSI[FG_GRAY]=90
-ANSI[FG_LIGHTBLUE]=94
-ANSI[FG_MAGENTA]=95
-
-ANSI[BG_BLACK]=40
-ANSI[BG_RED]=41
-ANSI[BG_GREEN]=42
-ANSI[BG_YELLOW]=43
-ANSI[BG_BLUE]=44
-ANSI[BG_PURPLE]=45
-ANSI[BG_CYAN]=46
-ANSI[BG_WHITE]=47
-ANSI[BG_GRAY]=90
-ANSI[BG_MAGENTA]=95
-
-readonly MIAOU_DEBUG MIAOU_ERROR_REGEX ANSI
-
+if [[ ! -v MIAOU_BASH_LOADED_ONCE ]]; then
+  readonly MIAOU_BASH_LOADED_ONCE=true
+  readonly MIAOU_DEBUG=${MIAOU_DEBUG:-false}
+  readonly MIAOU_ERROR_REGEX='^(.*): line ([0-9]+): miaou_error:'
+
+  declare -A ANSI
+  ANSI[RESET]=0
+
+  ANSI[STYLE_ITALIC]=3
+  ANSI[STYLE_BOLD]=1
+  ANSI[STYLE_UNDERLINE]=4
+  ANSI[STYLE_STRIKETHROUGH]=9
+
+  ANSI[FG_BLACK]=30
+  ANSI[FG_RED]=31
+  ANSI[FG_GREEN]=32
+  ANSI[FG_YELLOW]=33
+  ANSI[FG_BLUE]=34
+  ANSI[FG_PURPLE]=35
+  ANSI[FG_CYAN]=36
+  ANSI[FG_WHITE]=37
+  ANSI[FG_GRAY]=90
+  ANSI[FG_LIGHTBLUE]=94
+  ANSI[FG_MAGENTA]=95
+
+  ANSI[BG_BLACK]=40
+  ANSI[BG_RED]=41
+  ANSI[BG_GREEN]=42
+  ANSI[BG_YELLOW]=43
+  ANSI[BG_BLUE]=44
+  ANSI[BG_PURPLE]=45
+  ANSI[BG_CYAN]=46
+  ANSI[BG_WHITE]=47
+  ANSI[BG_GRAY]=90
+  ANSI[BG_MAGENTA]=95
+  readonly ANSI
+fi
 ## functions
 
 function is_true {