diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f7a665d..97bfe7d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@ jobs:
 
       - uses: actions/setup-go@v6
         with:
-          go-version: 1.17
+          go-version-file: go.mod
 
       - uses: actions/cache@v6
         with:
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 8d707d8..fcbb7e7 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -20,7 +20,7 @@ jobs:
 
       - uses: actions/setup-go@v6
         with:
-          go-version: 1.17
+          go-version-file: go.mod
 
       - name: lint
         uses: golangci/golangci-lint-action@v9
diff --git a/go.mod b/go.mod
index 2f80789..0bc11f9 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module github.com/peter-evans/patience
 
-go 1.17
+go 1.25
diff --git a/lcs.go b/lcs.go
index 30547e0..219886c 100644
--- a/lcs.go
+++ b/lcs.go
@@ -44,12 +44,3 @@ func LCS(a, b []string) [][2]int {
 
 	return s
 }
-
-// max returns the maximum of two integers.
-// nolint:predeclared
-func max(a, b int) int {
-	if a > b {
-		return a
-	}
-	return b
-}
diff --git a/unified.go b/unified.go
index 2d5f2b7..4e785b7 100644
--- a/unified.go
+++ b/unified.go
@@ -141,12 +141,3 @@ func makeHunks(diffs []DiffLine, precontext, postcontext int) []Hunk {
 
 	return hunks
 }
-
-// min returns the minimum of two integers.
-// nolint:predeclared
-func min(a, b int) int {
-	if a < b {
-		return a
-	}
-	return b
-}