diff --git a/antigen.zsh b/antigen.zsh
index 0f02b97..26e38cb 100644
--- a/antigen.zsh
+++ b/antigen.zsh
@@ -193,21 +193,21 @@ antigen-update () {
         # Source the plugin script
         # FIXME: I don't know. Looks very very ugly. Needs a better
         # implementation once tests are ready.
-        local script_loc="$(ls "$location" | grep -m1 '.plugin.zsh$')"
+        local script_loc="$(ls "$location" | grep -m1 '\.plugin\.zsh$')"
 
         if [[ -f $script_loc ]]; then
             # If we have a `*.plugin.zsh`, source it.
             source "$script_loc"
 
-        elif [[ ! -z "$(ls "$location" | grep -m1 '.zsh$')" ]]; then
+        elif [[ ! -z "$(ls "$location" | grep -m1 '\.zsh$')" ]]; then
             # If there is no `*.plugin.zsh` file, source *all* the `*.zsh`
             # files.
-            for script ($location/*.zsh) source "$script"
+            for script ($location/*.zsh(N)) source "$script"
 
-        elif [[ ! -z "$(ls "$location" | grep -m1 '.sh$')" ]]; then
+        elif [[ ! -z "$(ls "$location" | grep -m1 '\.sh$')" ]]; then
             # If there are no `*.zsh` files either, we look for and source any
             # `*.sh` files instead.
-            for script ($location/*.sh) source "$script"
+            for script ($location/*.sh(N)) source "$script"
 
         fi