diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 3564876..eec7f82 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -7,7 +7,6 @@ on:
     branches: [ "master" ]
 
 jobs:
-
   build:
     runs-on: macos-latest
     steps:
@@ -16,7 +15,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v3
       with:
-        go-version: 1.13
+        go-version: 1.21
 
     - name: Build
       run: go build -v ./...
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index bf4eacb..1d777f9 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -7,7 +7,6 @@ on:
     branches: [ "master" ]
 
 jobs:
-
   build:
     runs-on: ubuntu-latest
     steps:
@@ -16,7 +15,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v3
       with:
-        go-version: 1.18
+        go-version: 1.21
 
     - name: Build
       run: go build -v ./...
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index c460e60..ab8f8f4 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -7,7 +7,6 @@ on:
     branches: [ "master" ]
 
 jobs:
-
   build:
     runs-on: windows-latest
     steps:
@@ -16,7 +15,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v3
       with:
-        go-version: 1.18
+        go-version: 1.21
 
     - name: Build
       run: go build -v ./...
diff --git a/go.mod b/go.mod
index a22f3d5..8f59404 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,7 @@
 module github.com/pin/tftp/v3
 
-go 1.13
+go 1.18
 
-require golang.org/x/net v0.0.0-20200202094626-16171245cfb2
+require golang.org/x/net v0.15.0
+
+require golang.org/x/sys v0.13.0 // indirect
diff --git a/go.sum b/go.sum
index e58bf9c..d33ceb0 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,4 @@
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/net v0.0.0-20200202094626-16171245cfb2 h1:CCH4IOTTfewWjGOlSp+zGcjutRKlBEZQ6wTn8ozI/nI=
-golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/net v0.15.0 h1:ugBLEUaxABaB5AJqW9enI0ACdci2RUd4eP51NTBvuJ8=
+golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
+golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
+golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=