diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 49e3309..f1acb42 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,6 +29,10 @@ jobs:
         with:
           ruby-version: '2.6.x'
 
+      - name: install tooling
+        run: |
+          brew install yq
+
       - name: Checkout
         uses: actions/checkout@v2
         with:
diff --git a/.github/workflows/pages-deploy.yml.hook b/.github/workflows/pages-deploy.yml.hook
index 6d3ac74..1733a17 100644
--- a/.github/workflows/pages-deploy.yml.hook
+++ b/.github/workflows/pages-deploy.yml.hook
@@ -17,6 +17,10 @@ jobs:
         with:
           ruby-version: '2.6.x'
 
+      - name: install tooling
+        run: |
+          brew install yq
+
       - name: Checkout
         uses: actions/checkout@v2
         with:
@@ -62,6 +66,10 @@ jobs:
         with:
           ruby-version: '2.6.x'
 
+      - name: install tooling
+        run: |
+          brew install yq
+
       - name: Checkout
         uses: actions/checkout@v2
         with:
diff --git a/_scripts/sh/create_pages.sh b/_scripts/sh/create_pages.sh
index 0f2e39d..c2cf292 100755
--- a/_scripts/sh/create_pages.sh
+++ b/_scripts/sh/create_pages.sh
@@ -1,4 +1,4 @@
-#!/usr/local/bin/bash
+#!/usr/bin/env bash
 #
 # Create HTML pages for Categories and Tags in posts.
 #
@@ -25,19 +25,26 @@ _read_yaml() {
 
 read_categories() {
   local _yaml="$(_read_yaml "$1")"
-  local _categories="$(echo "$_yaml" | grep "^categories *:")"
-  local _category="$(echo "$_yaml" | grep "^category *:")"
+  local _categories="$(echo "$_yaml" | yq r - "categories.*")"
+  local _category="$(echo "$_yaml" | yq r - "category")"
 
   if [[ -n $_categories ]]; then
-    echo "$_categories" | sed "s/categories *: *//;s/\[//;s/\].*//;s/, */,/g;s/\"//g;s/'//g"
+    echo "$_categories"
   elif [[ -n $_category ]]; then
-    echo "$_category" | sed "s/category *: *//;s/\[//;s/\].*//;s/, */,/g;s/\"//g;s/'//g"
+    echo "$_category"
   fi
 }
 
 read_tags() {
   local _yaml="$(_read_yaml "$1")"
-  echo "$_yaml" | grep "^tags *:" | sed "s/tags *: *//;s/\[//;s/\].*//;s/, */,/g;s/\"//g;s/'//g"
+  local _tags="$(echo "$_yaml" | yq r - "tags.*")"
+  local _tag="$(echo "$_yaml" | yq r - "tag")"
+
+  if [[ -n $_tags ]]; then
+    echo "$_tags"
+  elif [[ -n $_tag ]]; then
+    echo "$_tag"
+  fi
 }
 
 init() {
@@ -102,19 +109,19 @@ create_pages() {
   if [[ -n $1 ]]; then
     # split string to array
     IFS_BAK=$IFS
-    IFS=','
+    IFS=$'\n'
     local _string=$1
 
     case $2 in
 
       $TYPE_CATEGORY)
-        for i in ${_string#,}; do
+        for i in $_string; do
           create_category "$i"
         done
         ;;
 
       $TYPE_TAG)
-        for i in ${_string#,}; do
+        for i in $_string; do
           create_tag "$i"
         done
         ;;