diff --git a/hooks/_common.sh b/hooks/_common.sh
index 7281b0244..c63918033 100644
--- a/hooks/_common.sh
+++ b/hooks/_common.sh
@@ -176,9 +176,9 @@ function common::is_hook_run_on_whole_repo {
   local all_files_that_can_be_checked
 
   if [ -z "$excluded_files" ]; then
-    all_files_that_can_be_checked=$(git ls-files | sort | grep -e "$included_files" | tr '\n' ' ')
+    all_files_that_can_be_checked=$(git ls-files | sort | grep -E -- "$included_files" | tr '\n' ' ')
   else
-    all_files_that_can_be_checked=$(git ls-files | sort | grep -e "$included_files" | grep -v -e "$excluded_files" | tr '\n' ' ')
+    all_files_that_can_be_checked=$(git ls-files | sort | grep -E -- "$included_files" | grep -v -E -- "$excluded_files" | tr '\n' ' ')
   fi
 
   if [ "$files_to_check" == "$all_files_that_can_be_checked" ]; then
diff --git a/hooks/terraform_docs.sh b/hooks/terraform_docs.sh
index 02d012f83..7644b5e4c 100755
--- a/hooks/terraform_docs.sh
+++ b/hooks/terraform_docs.sh
@@ -187,7 +187,7 @@ function terraform_docs {
     config_file_no_color="$config_file$(date +%s).yml"
 
     if [ "$PRE_COMMIT_COLOR" = "never" ] &&
-      [[ $(grep -e '^formatter:' "$config_file") == *"pretty"* ]] &&
+      [[ $(grep -E '^formatter:' "$config_file") == *"pretty"* ]] &&
       [[ $(grep '  color: ' "$config_file") != *"false"* ]]; then
 
       cp "$config_file" "$config_file_no_color"
diff --git a/hooks/terraform_trivy.sh b/hooks/terraform_trivy.sh
index fb4a529a0..d607d67a5 100755
--- a/hooks/terraform_trivy.sh
+++ b/hooks/terraform_trivy.sh
@@ -65,7 +65,7 @@ function run_hook_on_whole_repo {
   local -a -r args=("$@")
 
   # pass the arguments to hook
-  trivy conf "$(pwd)" "${args[@]}"
+  trivy conf "$(pwd)" --exit-code=1 "${args[@]}"
 
   # return exit code to common::per_dir_hook
   local exit_code=$?