diff --git a/.github/workflows/production.yaml b/.github/workflows/production.yaml
index 83d07d6..838b42a 100644
--- a/.github/workflows/production.yaml
+++ b/.github/workflows/production.yaml
@@ -27,6 +27,9 @@ jobs:
         with:
           node-version: "20"
 
+      - name: Install Dart Sass
+        run: sudo snap install dart-sass
+
       - name: Cache dependencies
         uses: actions/cache@v4
         with:
@@ -41,7 +44,7 @@ jobs:
       - name: Setup Hugo
         uses: peaceiris/actions-hugo@v3
         with:
-          hugo-version: "0.133.0"
+          hugo-version: "0.134.1"
           extended: true
 
       - name: Cache Hugo modules
diff --git a/.github/workflows/staging.yaml b/.github/workflows/staging.yaml
index 4b152b1..f54e06b 100644
--- a/.github/workflows/staging.yaml
+++ b/.github/workflows/staging.yaml
@@ -25,6 +25,9 @@ jobs:
         with:
           node-version: "20"
 
+      - name: Install Dart Sass
+        run: sudo snap install dart-sass
+
       - name: Cache dependencies
         uses: actions/cache@v4
         with:
@@ -39,7 +42,7 @@ jobs:
       - name: Setup Hugo
         uses: peaceiris/actions-hugo@v3
         with:
-          hugo-version: "0.133.0"
+          hugo-version: "0.134.1"
           extended: true
 
       - name: Cache Hugo modules
diff --git a/go.sum b/go.sum
index 92d6a53..1d7c43e 100644
--- a/go.sum
+++ b/go.sum
@@ -16,6 +16,7 @@ github.com/hbstack/base v0.6.0 h1:kIMI5C7X1aTWffKnG9N5Db20O6DhjyztN5yAPIFFDbY=
 github.com/hbstack/base v0.6.0/go.mod h1:4A2bxdXMjpj4HSEnugN7hlFECiap4zUX56jOqtu4YPY=
 github.com/hbstack/base v0.6.1 h1:WqzfSNGE3jtauNS5QWyXiwweWa+InP63D+klz61IJIU=
 github.com/hbstack/base v0.6.1/go.mod h1:rDOIrQy8GKXqam3dvHPQnrvwadQByiGcDY1Q35wBrT4=
+github.com/hbstack/base v0.6.2 h1:ihsxMroTujvjVnKZwueujELNXGo9gsCQdrBrJ32zkuU=
 github.com/hbstack/base v0.6.2/go.mod h1:eO3xP3CJ2Dwc38+FjVqZuzmvT8dYF2D2Dw4Sx4pi9Ng=
 github.com/hbstack/bigger-picture v0.10.1 h1:EgUYZgSGhl4KwKVqryf6ncB2QY4YYgOqTpDW6+5tq14=
 github.com/hbstack/bigger-picture v0.10.1/go.mod h1:wZpRrOlTFrt2lO3tl9Y7cIAJbAJN1MdvRu0UsbCnkaE=
@@ -95,6 +96,7 @@ github.com/hbstack/hb v0.12.3 h1:/sJEzqpGY4dJDNc2YcIRMT7sgLOwmKKckHG6VXzDuEQ=
 github.com/hbstack/hb v0.12.3/go.mod h1:K+8F6OQKKAVneWZKzW/Jj3vbqaG1ewFIH/P7HKNeF3o=
 github.com/hbstack/hb v0.12.4 h1:dhhsoGyHq2HGhz3xJUGuyK6A4sqiTxW1l8yuTREr4JM=
 github.com/hbstack/hb v0.12.4/go.mod h1:FJilVCHtkVpfXZT+Ii2OFCVeu9wQh/YGgRMuPKX5ycA=
+github.com/hbstack/hb v0.14.0 h1:YYjSwIrjpLFSMkyHHDbh7xMf8dyEQba4XhIafAS7avs=
 github.com/hbstack/hb v0.14.0/go.mod h1:FJilVCHtkVpfXZT+Ii2OFCVeu9wQh/YGgRMuPKX5ycA=
 github.com/hbstack/header v0.14.5 h1:TGjaudDop6df38A0K8hjMOdmcD1WpUN03xenpgR7tJw=
 github.com/hbstack/header v0.14.5/go.mod h1:W7eolpYJctsTD8GVFEj09Ogbqqy8OAqcxBEbW3ZTYIg=