diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d5ac763
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+.aider*
+.env
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..bf8eee2
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module go-mod.ewintr.nl/linkchecker
+
+go 1.23.3
+
+require golang.org/x/net v0.31.0
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..26142d0
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,2 @@
+golang.org/x/net v0.31.0 h1:68CPQngjLL0r2AlUKiSxtQFKvzRVbnzLwMUn5SzcLHo=
+golang.org/x/net v0.31.0/go.mod h1:P4fl1q7dY2hnZFxEk4pPSkDHF+QqjitcnDjUQyMM+pM=