diff --git a/ls_pre_commit_hooks/poetry-run.sh b/ls_pre_commit_hooks/poetry-run.sh
index 41ced81..e6644b0 100755
--- a/ls_pre_commit_hooks/poetry-run.sh
+++ b/ls_pre_commit_hooks/poetry-run.sh
@@ -1,6 +1,6 @@
 #!/bin/bash -e
 
-if ! which -s poetry; then
+if ! [ -x "$(command -v poetry)" ]; then
   echo 'poetry command not found'
   echo 'See https://python-poetry.org/docs/#installation for installation instructions.'
   exit 1