diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 86d87fc..17240c5 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -2,23 +2,23 @@ name: Tests
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
+    branches: [main]
 
 jobs:
   test:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - name: Set up Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
         with:
-          go-version: 1.21
+          go-version-file: go.mod
 
       - name: Unit tests
         run: go test -coverprofile=cover.out ./...
@@ -30,7 +30,7 @@ jobs:
 
       - name: Modver
         if: ${{ github.event_name == 'pull_request' }}
-        uses: bobg/modver@v2.5.0
+        uses: bobg/modver@v2.7.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           pull_request_url: https://github.com/${{ github.repository }}/pull/${{ github.event.number }}
diff --git a/go.mod b/go.mod
index bde4b2c..4d506e8 100644
--- a/go.mod
+++ b/go.mod
@@ -1,17 +1,16 @@
 module github.com/bobg/decouple
 
-go 1.21
+go 1.22
 
-toolchain go1.21.0
+toolchain go1.22.0
 
 require (
-	github.com/bobg/errors v0.10.0
-	github.com/bobg/go-generics/v3 v3.0.0
-	golang.org/x/tools v0.12.0
+	github.com/bobg/errors v1.0.0
+	github.com/bobg/go-generics/v3 v3.4.0
+	golang.org/x/tools v0.18.0
 )
 
 require (
 	github.com/mattn/go-sqlite3 v1.14.15 // indirect
-	golang.org/x/mod v0.12.0 // indirect
-	golang.org/x/sys v0.11.0 // indirect
+	golang.org/x/mod v0.15.0 // indirect
 )
diff --git a/go.sum b/go.sum
index 68357aa..00e7926 100644
--- a/go.sum
+++ b/go.sum
@@ -1,14 +1,14 @@
-github.com/bobg/errors v0.10.0 h1:zlGq7hLqgaJILpwDmCDTnPvlvKI8M9Rh3uTRCuaMbiU=
-github.com/bobg/errors v0.10.0/go.mod h1:lJenauJJF2tAdzEmND/wGVfA9kCChcj2p4KO/bNCz24=
-github.com/bobg/go-generics/v3 v3.0.0 h1:dXo1WOnH2aZR6Lk8ucHqNBM5pvjyHQmu/fyPS8aHehM=
-github.com/bobg/go-generics/v3 v3.0.0/go.mod h1:dIvFGgkJ/yLxLo1ocZKqYo9RrbfHfe+uIYnINMKblgo=
+github.com/bobg/errors v1.0.0 h1:6LyPD40qy06No4HR6xJIvnd0BSpnyUaXxWMxJKPhU0A=
+github.com/bobg/errors v1.0.0/go.mod h1:Q4775qBZpnte7EGFJqmvnlB1U4pkI1XmU3qxqdp7Zcc=
+github.com/bobg/go-generics/v3 v3.4.0 h1:XxTJxH843OknMgw//HGQXklJCZ0eacdt5EABfNcKFr8=
+github.com/bobg/go-generics/v3 v3.4.0/go.mod h1:gCsHnnRz88zpXpdsWPyDmjg1tYQPmpbUQbM4MW8z9Jc=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/mattn/go-sqlite3 v1.14.15 h1:vfoHhTN1af61xCRSWzFIWzx2YskyMTwHLrExkBOjvxI=
 github.com/mattn/go-sqlite3 v1.14.15/go.mod h1:2eHXhiwb8IkHr+BDWZGa96P6+rkvnG63S2DGjv9HUNg=
-golang.org/x/mod v0.12.0 h1:rmsUpXtvNzj340zd98LZ4KntptpfRHwpFOHG188oHXc=
-golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
-golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
-golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
-golang.org/x/sys v0.11.0 h1:eG7RXZHdqOJ1i+0lgLgCpSXAp6M3LYlAo6osgSi0xOM=
-golang.org/x/sys v0.11.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/tools v0.12.0 h1:YW6HUoUmYBpwSgyaGaZq1fHjrBjX1rlpZ54T6mu2kss=
-golang.org/x/tools v0.12.0/go.mod h1:Sc0INKfu04TlqNoRA1hgpFZbhYXHPr4V5DzpSBTPqQM=
+golang.org/x/mod v0.15.0 h1:SernR4v+D55NyBH2QiEQrlBAnj1ECL6AGrA5+dPaMY8=
+golang.org/x/mod v0.15.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+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/tools v0.18.0 h1:k8NLag8AGHnn+PHbl7g43CtqZAwG60vZkLqgyZgIHgQ=
+golang.org/x/tools v0.18.0/go.mod h1:GL7B4CwcLLeo59yx/9UWWuNOW1n3VZ4f5axWfML7Lcg=