diff --git a/ci/fmt.sh b/ci/fmt.sh
index e319a1e4..588510ba 100755
--- a/ci/fmt.sh
+++ b/ci/fmt.sh
@@ -2,8 +2,7 @@
 set -eu
 cd -- "$(dirname "$0")/.."
 
-# Pin golang.org/x/tools, the go.mod of v0.25.0 is incompatible with Go 1.19.
-X_TOOLS_VERSION=v0.24.0
+X_TOOLS_VERSION=v0.31.0
 
 go mod tidy
 (cd ./internal/thirdparty && go mod tidy)
diff --git a/ci/lint.sh b/ci/lint.sh
index cf9d1abd..20daff92 100755
--- a/ci/lint.sh
+++ b/ci/lint.sh
@@ -3,10 +3,13 @@ set -x
 set -eu
 cd -- "$(dirname "$0")/.."
 
+STATICCHECK_VERSION=v0.6.1
+GOVULNCHECK_VERSION=v1.1.4
+
 go vet ./...
 GOOS=js GOARCH=wasm go vet ./...
 
-go install honnef.co/go/tools/cmd/staticcheck@v0.4.7
+go install honnef.co/go/tools/cmd/staticcheck@${STATICCHECK_VERSION}
 staticcheck ./...
 GOOS=js GOARCH=wasm staticcheck ./...
 
@@ -16,7 +19,7 @@ govulncheck() {
 		cat "$tmpf"
 	fi
 }
-go install golang.org/x/vuln/cmd/govulncheck@v1.1.1
+go install golang.org/x/vuln/cmd/govulncheck@${GOVULNCHECK_VERSION}
 govulncheck ./...
 GOOS=js GOARCH=wasm govulncheck ./...
 
diff --git a/go.mod b/go.mod
index 336411a5..d32fbd77 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module github.com/coder/websocket
 
-go 1.19
+go 1.23
diff --git a/internal/examples/go.mod b/internal/examples/go.mod
index 2aa1ee02..e368b76b 100644
--- a/internal/examples/go.mod
+++ b/internal/examples/go.mod
@@ -1,6 +1,6 @@
 module github.com/coder/websocket/examples
 
-go 1.19
+go 1.23
 
 replace github.com/coder/websocket => ../..
 
diff --git a/internal/thirdparty/go.mod b/internal/thirdparty/go.mod
index e060ce67..7a86aca9 100644
--- a/internal/thirdparty/go.mod
+++ b/internal/thirdparty/go.mod
@@ -1,6 +1,6 @@
 module github.com/coder/websocket/internal/thirdparty
 
-go 1.19
+go 1.23
 
 replace github.com/coder/websocket => ../..
 
diff --git a/internal/thirdparty/go.sum b/internal/thirdparty/go.sum
index 2352ac75..a7be7082 100644
--- a/internal/thirdparty/go.sum
+++ b/internal/thirdparty/go.sum
@@ -16,6 +16,7 @@ github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm
 github.com/gin-gonic/gin v1.10.0 h1:nTuyha1TYqgedzytsKYqna+DfLos46nTv2ygFy86HFU=
 github.com/gin-gonic/gin v1.10.0/go.mod h1:4PMNQiOhvDRa013RKVbsiNwoyezlm2rm0uX/T7kzp5Y=
 github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
+github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
 github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
 github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
 github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
@@ -31,6 +32,7 @@ github.com/gobwas/ws v1.4.0/go.mod h1:G3gNqMNtPppf5XUz7O4shetPpcZ1VJ7zt18dlUeakr
 github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
 github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
 github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
@@ -96,6 +98,7 @@ golang.org/x/text v0.15.0 h1:h1V/4gjBv8v9cjcR6+AR5+/cIYK5N/WAgiv4xlsEtAk=
 golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/protobuf v1.34.1 h1:9ddQBjfCyZPOHPUiPxpYESBLc+T8P3E+Vo4IbKZgFWg=
 google.golang.org/protobuf v1.34.1/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=