diff --git a/acme/acme.go b/acme/acme.go
index 8619508..03e24e4 100644
--- a/acme/acme.go
+++ b/acme/acme.go
@@ -15,6 +15,7 @@ package acme
 
 import (
 	"bytes"
+	"context"
 	"crypto"
 	"crypto/ecdsa"
 	"crypto/elliptic"
@@ -37,7 +38,6 @@ import (
 	"sync"
 	"time"
 
-	"golang.org/x/net/context"
 	"golang.org/x/net/context/ctxhttp"
 )
 
diff --git a/acme/acme_test.go b/acme/acme_test.go
index 1205dbb..e746c07 100644
--- a/acme/acme_test.go
+++ b/acme/acme_test.go
@@ -6,6 +6,7 @@ package acme
 
 import (
 	"bytes"
+	"context"
 	"crypto/rand"
 	"crypto/rsa"
 	"crypto/tls"
@@ -23,8 +24,6 @@ import (
 	"strings"
 	"testing"
 	"time"
-
-	"golang.org/x/net/context"
 )
 
 // Decodes a JWS-encoded request and unmarshals the decoded JSON into a provided
diff --git a/acme/autocert/autocert.go b/acme/autocert/autocert.go
index dfb860f..f50c88e 100644
--- a/acme/autocert/autocert.go
+++ b/acme/autocert/autocert.go
@@ -10,6 +10,7 @@ package autocert
 
 import (
 	"bytes"
+	"context"
 	"crypto"
 	"crypto/ecdsa"
 	"crypto/elliptic"
@@ -30,7 +31,6 @@ import (
 	"time"
 
 	"golang.org/x/crypto/acme"
-	"golang.org/x/net/context"
 )
 
 // pseudoRand is safe for concurrent use.
diff --git a/acme/autocert/autocert_test.go b/acme/autocert/autocert_test.go
index c3f3f66..acef162 100644
--- a/acme/autocert/autocert_test.go
+++ b/acme/autocert/autocert_test.go
@@ -5,6 +5,7 @@
 package autocert
 
 import (
+	"context"
 	"crypto"
 	"crypto/ecdsa"
 	"crypto/elliptic"
@@ -27,7 +28,6 @@ import (
 	"time"
 
 	"golang.org/x/crypto/acme"
-	"golang.org/x/net/context"
 )
 
 var discoTmpl = template.Must(template.New("disco").Parse(`{
diff --git a/acme/autocert/cache.go b/acme/autocert/cache.go
index 9b184aa..9f3e9d1 100644
--- a/acme/autocert/cache.go
+++ b/acme/autocert/cache.go
@@ -5,12 +5,11 @@
 package autocert
 
 import (
+	"context"
 	"errors"
 	"io/ioutil"
 	"os"
 	"path/filepath"
-
-	"golang.org/x/net/context"
 )
 
 // ErrCacheMiss is returned when a certificate is not found in cache.
diff --git a/acme/autocert/cache_test.go b/acme/autocert/cache_test.go
index ad6d4a4..6e1b88d 100644
--- a/acme/autocert/cache_test.go
+++ b/acme/autocert/cache_test.go
@@ -5,13 +5,12 @@
 package autocert
 
 import (
+	"context"
 	"io/ioutil"
 	"os"
 	"path/filepath"
 	"reflect"
 	"testing"
-
-	"golang.org/x/net/context"
 )
 
 // make sure DirCache satisfies Cache interface
diff --git a/acme/autocert/renewal.go b/acme/autocert/renewal.go
index 0d2eb60..14ac905 100644
--- a/acme/autocert/renewal.go
+++ b/acme/autocert/renewal.go
@@ -5,11 +5,10 @@
 package autocert
 
 import (
+	"context"
 	"crypto"
 	"sync"
 	"time"
-
-	"golang.org/x/net/context"
 )
 
 // maxRandRenew is a maximum deviation from Manager.RenewBefore.
diff --git a/acme/autocert/renewal_test.go b/acme/autocert/renewal_test.go
index 27958bb..87474b6 100644
--- a/acme/autocert/renewal_test.go
+++ b/acme/autocert/renewal_test.go
@@ -5,6 +5,7 @@
 package autocert
 
 import (
+	"context"
 	"crypto/ecdsa"
 	"crypto/elliptic"
 	"crypto/rand"
@@ -18,7 +19,6 @@ import (
 	"time"
 
 	"golang.org/x/crypto/acme"
-	"golang.org/x/net/context"
 )
 
 func TestRenewalNext(t *testing.T) {