diff --git a/bin/replace b/bin/replace
index c4d0cb6..ccd3212 100755
--- a/bin/replace
+++ b/bin/replace
@@ -4,9 +4,9 @@
 #
 # replace foo bar **/*.rb
 
-find_this=$1
+find_this="$1"
 shift
-replace_with=$1
+replace_with="$1"
 shift
 
-ag -l --nocolor $find_this $* | xargs sed -i '' "s/$find_this/$replace_with/g"
+ag -l --nocolor "$find_this" $* | xargs sed -i '' "s/$find_this/$replace_with/g"