diff --git a/README.md b/README.md
index 4f5c7d0..895303c 100644
--- a/README.md
+++ b/README.md
@@ -100,7 +100,7 @@ Export the `PS1` variable with the output of `prettyprompt $?` as its value.
 User-specific: `~/.zshrc`  
 System-wide: `/etc/zsh/zshrc`  
 ```sh    
-export PS1='$(prettyprompt $?)' # Notice the single quotes
+export PS1="$(prettyprompt $?)" # Notice the double quotes
 ```  
 
 ### Other shells