diff --git a/.github/workflows/binaries.yml b/.github/workflows/binaries.yml
index 46d72ad..113a6e2 100644
--- a/.github/workflows/binaries.yml
+++ b/.github/workflows/binaries.yml
@@ -9,7 +9,7 @@ jobs:
     name: release linux/amd64
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: wangyoucao577/go-release-action@v1.35
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -22,7 +22,7 @@ jobs:
     name: release linux/arm64
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: wangyoucao577/go-release-action@v1.35
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -35,7 +35,7 @@ jobs:
     name: release darwin/amd64
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: wangyoucao577/go-release-action@v1.35
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -48,7 +48,7 @@ jobs:
     name: release darwin/arm64
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: wangyoucao577/go-release-action@v1.35
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -61,7 +61,7 @@ jobs:
     name: release windows
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: wangyoucao577/go-release-action@v1.35
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e9b213c..6941ee5 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,14 +7,14 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: [ '1.16', '1.17' ]
+        go: [ '1.22', '1.21' ]
 
     name: Go ${{ matrix.go }} testing
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Set up Go
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v5
       with:
         go-version: ${{ matrix.go }}
 
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 78df272..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-language: go
-go:
-  - 1.13
-  - 1.14
-  - tip
-scripts:
-  - go test
diff --git a/go.mod b/go.mod
index 67f13f3..a2a8338 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,3 @@
 module github.com/a8m/envsubst
 
-go 1.21
-
-require gopkg.in/yaml.v2 v2.4.0 // indirect
+go 1.22
diff --git a/go.sum b/go.sum
index 7534661..e69de29 100644
--- a/go.sum
+++ b/go.sum
@@ -1,3 +0,0 @@
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=