diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..971843e
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,25 @@
+version: 2
+
+updates:
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "12:00"
+    timezone: Asia/Tokyo
+  groups:
+    dependencies:
+      patterns:
+        - "*"
+  open-pull-requests-limit: 10
+- package-ecosystem: gomod
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "12:00"
+    timezone: Asia/Tokyo
+  groups:
+    dependencies:
+      patterns:
+        - "*"
+  open-pull-requests-limit: 10
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a0d7ef1..14cabed 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,17 +12,25 @@ on:
 
 jobs:
   test:
+    strategy:
+      matrix:
+        go-version: [ 1.21.x ]
+        os: [ ubuntu-latest ]
     name: Test
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 5
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
+        with:
+          token: ${{secrets.GITHUB_TOKEN}}
+          fetch-depth: 0
 
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
-          go-version: 1.19
+          go-version: ${{ matrix.go-version }}
 
       - name: Get dependencies
         run: |
diff --git a/go.mod b/go.mod
index 4302b08..d24d2e3 100644
--- a/go.mod
+++ b/go.mod
@@ -1,11 +1,11 @@
 module github.com/tomtwinkle/excelizeam
 
-go 1.19
+go 1.21
 
 require (
 	github.com/stretchr/testify v1.8.1
 	github.com/xuri/excelize/v2 v2.8.0
-	golang.org/x/sync v0.5.0
+	golang.org/x/sync v0.6.0
 )
 
 require (
@@ -16,8 +16,8 @@ require (
 	github.com/richardlehane/msoleps v1.0.3 // indirect
 	github.com/xuri/efp v0.0.0-20231025114914-d1ff6096ae53 // indirect
 	github.com/xuri/nfp v0.0.0-20230919160717-d98342af3f05 // indirect
-	golang.org/x/crypto v0.16.0 // indirect
-	golang.org/x/net v0.19.0 // indirect
+	golang.org/x/crypto v0.18.0 // indirect
+	golang.org/x/net v0.20.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/go.sum b/go.sum
index cd7f4af..fc9065a 100644
--- a/go.sum
+++ b/go.sum
@@ -39,6 +39,8 @@ golang.org/x/crypto v0.5.0/go.mod h1:NK/OQwhpMQP3MwtdjgLlYHnH9ebylxKWv3e0fK+mkQU
 golang.org/x/crypto v0.12.0/go.mod h1:NF0Gs7EO5K4qLn+Ylc+fih8BSTeIjAP05siRnAh98yw=
 golang.org/x/crypto v0.16.0 h1:mMMrFzRSCF0GvB7Ne27XVtVAaXLrPmgPC7/v0tkwHaY=
 golang.org/x/crypto v0.16.0/go.mod h1:gCAAfMLgwOJRpTjQ2zCCt2OcSfYMTeZVSRtQlPC7Nq4=
+golang.org/x/crypto v0.18.0 h1:PGVlW0xEltQnzFZ55hkuX5+KLyrMYhHld1YHO4AKcdc=
+golang.org/x/crypto v0.18.0/go.mod h1:R0j02AL6hcrfOiy9T4ZYp/rcWeMxM3L6QYxlOuEG1mg=
 golang.org/x/image v0.0.0-20220902085622-e7cb96979f69 h1:Lj6HJGCSn5AjxRAH2+r35Mir4icalbqku+CLUtjnvXY=
 golang.org/x/image v0.0.0-20220902085622-e7cb96979f69/go.mod h1:doUCurBvlfPMKfmIpRIywoHmhN3VyhnoFDbvIEWF4hY=
 golang.org/x/image v0.11.0/go.mod h1:bglhjqbqVuEb9e9+eNR45Jfu7D+T4Qan+NhQk8Ck2P8=
@@ -54,12 +56,16 @@ golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
 golang.org/x/net v0.14.0/go.mod h1:PpSgVXXLK0OxS0F31C1/tv6XNguvCrnXIDrFMspZIUI=
 golang.org/x/net v0.19.0 h1:zTwKpTd2XuCqf8huc7Fo2iSy+4RHPd10s4KzeTnVr1c=
 golang.org/x/net v0.19.0/go.mod h1:CfAk/cbD4CthTvqiEl8NpboMuiuOYsAr/7NOjZJtv1U=
+golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
+golang.org/x/net v0.20.0/go.mod h1:z8BVo6PvndSri0LbOE3hAn0apkU+1YvI6E70E9jsnvY=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.5.0 h1:60k92dhOjHxJkrqnwsfl8KuaHbn/5dl0lUPUklKo3qE=
 golang.org/x/sync v0.5.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sync v0.6.0 h1:5BMeUDZ7vkXGfEr1x9B4bRcTH4lpkTkpdh0T/J+qjbQ=
+golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=