diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 0000000..9c135f2
--- /dev/null
+++ b/.github/workflows/ci.yaml
@@ -0,0 +1,36 @@
+name: Run tests
+
+on:
+  pull_request:
+    branches: [master]
+  push:
+    branches: [master]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go: ["1.18", "1.19", "1.20", "1.21", "1.22", "1.23", "1.24"]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Go ${{ matrix.go }}
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.go }}
+
+      - name: Build
+        run: go build -v ./...
+
+      - name: gofmt
+        run: |
+          unformatted_files=$(gofmt -l .)
+          if [ -n "$unformatted_files" ]; then
+            echo "The following files are not Go formatted:"
+            echo "$unformatted_files"
+            echo "Please run 'gofmt -w .' to fix them."
+            exit 1
+          fi
+          echo "All Go files are well formatted."
diff --git a/go.mod b/go.mod
index 948aa5c..238a50f 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/ipinfo/go/v2
 
-go 1.15
+go 1.18
 
 require (
 	github.com/patrickmn/go-cache v2.1.0+incompatible
diff --git a/ipinfo/doc.go b/ipinfo/doc.go
index f973863..689c33a 100644
--- a/ipinfo/doc.go
+++ b/ipinfo/doc.go
@@ -10,7 +10,7 @@ For example:
 
 	info, err := ipinfo.GetIPInfo(net.ParseIP("8.8.8.8"))
 
-Authorization
+# Authorization
 
 To perform authorized API calls with more data and higher limits, pass in a
 non-empty token to NewClient. For example: