diff --git a/ok b/ok
index 9d632c8..abef63c 100755
--- a/ok
+++ b/ok
@@ -5,9 +5,9 @@
 ok() {
 
 # used for colored output
-CYAN=$'\033[0;36m'
-BLUE=$'\033[0;34m'
-NC=$'\033[0m' # No Color
+local CYAN=$'\033[0;36m'
+local BLUE=$'\033[0;34m'
+local NC=$'\033[0m' # No Color
 
   # if there is a file called .ok...
   if [ -f .ok ]; then