diff --git a/.github/workflows/static-analysis.yml b/.github/workflows/static-analysis.yml
index 21f6df4..3c4312d 100644
--- a/.github/workflows/static-analysis.yml
+++ b/.github/workflows/static-analysis.yml
@@ -12,7 +12,7 @@ jobs:
   build:
     strategy:
       matrix:
-        go-version: [1.18, 1.19]
+        go-version: ["1.20"]
     runs-on: ubuntu-latest
 
     steps:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 88075ce..c8fd6ee 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,7 +12,7 @@ jobs:
   build:
     strategy:
       matrix:
-        go-version: [1.18, 1.19]
+        go-version: ["1.18", "1.19", "1.20"]
         # TODO(mdlayher): tests are failing on macOS but almost all consumers of
         # this package are Linux. Investigate.
         os: [ubuntu-latest]
diff --git a/go.mod b/go.mod
index 2b4aa4f..46fcd4c 100644
--- a/go.mod
+++ b/go.mod
@@ -1,13 +1,13 @@
 module github.com/mdlayher/ndp
 
-go 1.18
+go 1.20
 
 require (
 	github.com/google/go-cmp v0.5.9
-	golang.org/x/net v0.2.0
+	golang.org/x/net v0.9.0
 )
 
 require (
-	golang.org/x/sys v0.2.0 // indirect
-	golang.org/x/text v0.4.0 // indirect
+	golang.org/x/sys v0.7.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
 )
diff --git a/go.sum b/go.sum
index f2b0400..0cec149 100644
--- a/go.sum
+++ b/go.sum
@@ -1,8 +1,8 @@
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-golang.org/x/net v0.2.0 h1:sZfSu1wtKLGlWI4ZZayP0ck9Y73K1ynO6gqzTdBVdPU=
-golang.org/x/net v0.2.0/go.mod h1:KqCZLdyyvdV855qA2rE3GC2aiw5xGR5TEjj8smXukLY=
-golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
-golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/text v0.4.0 h1:BrVqGRd7+k1DiOgtnFvAkoQEWQvBc25ouMJM6429SFg=
-golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/net v0.9.0 h1:aWJ/m6xSmxWBx+V0XRHTlrYrPG56jKsLdTFmsSsCzOM=
+golang.org/x/net v0.9.0/go.mod h1:d48xBJpPfHeWQsugry2m+kC02ZBRGRgulfHnEXEuWns=
+golang.org/x/sys v0.7.0 h1:3jlCCIQZPdOYu1h8BkNvLz8Kgwtae2cagcG/VamtZRU=
+golang.org/x/sys v0.7.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/text v0.9.0 h1:2sjJmO8cDvYveuX97RDLsxlyUxLl+GHoLxBiRdHllBE=
+golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=