diff --git a/gitprompt.sh b/gitprompt.sh
index 55b772c..f23a134 100755
--- a/gitprompt.sh
+++ b/gitprompt.sh
@@ -12,7 +12,9 @@ function async_run() {
 function async_run_zsh() {
   {
     eval "$@" &> /dev/null
-  }&!
+
+  # `true` is used here to allow bash to parse the script, as the zsh `&!` syntax will otherwise stop parsing prior to any execution.
+  }&! true
 }