diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index aedaa82..993bed2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,9 +12,9 @@ jobs:
         os: [ ubuntu-latest, windows-latest, macos-latest ]
         # The versions should contain (at least) the lowest requirement
         #    and a version that is more up to date.
-        toit-version: [ v2.0.0-alpha.150, latest ]
+        toit-version: [ v2.0.0-alpha.170, latest ]
         include:
-          - toit-version: v2.0.0-alpha.150
+          - toit-version: v2.0.0-alpha.170
             version-name: old
           - toit-version: latest
             version-name: new
diff --git a/examples/package.lock b/examples/package.lock
index 8bca916..d208d54 100644
--- a/examples/package.lock
+++ b/examples/package.lock
@@ -8,5 +8,5 @@ packages:
   toit-cert-roots:
     url: github.com/toitware/toit-cert-roots
     name: certificate-roots
-    version: 1.9.0
+    version: 1.10.0
     hash: 1445c4a6cae47689674ae02c5f1dc03660f1df8c
diff --git a/examples/package.yaml b/examples/package.yaml
index 9d0ed84..0fc0e39 100644
--- a/examples/package.yaml
+++ b/examples/package.yaml
@@ -1,6 +1,6 @@
 dependencies:
   certificate_roots:
     url: github.com/toitware/toit-cert-roots
-    version: ^1.9.0
+    version: ^1.10.0
   http:
     path: ..
diff --git a/package.lock b/package.lock
new file mode 100644
index 0000000..3939b1f
--- /dev/null
+++ b/package.lock
@@ -0,0 +1 @@
+sdk: ^2.0.0-alpha.170
diff --git a/package.yaml b/package.yaml
index 7b7636f..9246a55 100644
--- a/package.yaml
+++ b/package.yaml
@@ -1,4 +1,4 @@
 name: http
 description: An HTTP server and client.
 environment:
-  sdk: ^2.0.0-alpha.150
+  sdk: ^2.0.0-alpha.170
diff --git a/tests/package.lock b/tests/package.lock
index e4a5031..688dea2 100644
--- a/tests/package.lock
+++ b/tests/package.lock
@@ -1,4 +1,4 @@
-sdk: ^2.0.0-alpha.150
+sdk: ^2.0.0-alpha.170
 prefixes:
   certificate_roots: toit-cert-roots
   fs: pkg-fs
@@ -17,10 +17,10 @@ packages:
   pkg-host:
     url: github.com/toitlang/pkg-host
     name: host
-    version: 1.15.3
-    hash: 62393e8522b77eafbafe60b9817935266117daf6
+    version: 1.16.2
+    hash: ae83f761db80166a20bb38498edd009916b72563
   toit-cert-roots:
     url: github.com/toitware/toit-cert-roots
     name: certificate-roots
-    version: 1.9.0
+    version: 1.10.0
     hash: 1445c4a6cae47689674ae02c5f1dc03660f1df8c
diff --git a/tests/package.yaml b/tests/package.yaml
index dd9af95..a4f808f 100644
--- a/tests/package.yaml
+++ b/tests/package.yaml
@@ -1,12 +1,12 @@
 dependencies:
   certificate_roots:
     url: github.com/toitware/toit-cert-roots
-    version: ^1.9.0
+    version: ^1.10.0
   fs:
     url: github.com/toitlang/pkg-fs
     version: ^2.3.1
   host:
     url: github.com/toitlang/pkg-host
-    version: ^1.15.3
+    version: ^1.16.2
   http:
     path: ..
diff --git a/tests/webdriver.toit b/tests/webdriver.toit
index 75ca64a..8194c49 100644
--- a/tests/webdriver.toit
+++ b/tests/webdriver.toit
@@ -19,7 +19,7 @@ DRIVERS_ ::= {
 
 class WebDriver:
   driver-app_/string
-  child-process_/any := null
+  child-process_/pipe.Process? := null
   session-url_/string? := null
   network_/net.Interface? := null
   client_/http.Client? := null
@@ -40,14 +40,10 @@ class WebDriver:
         "$program-dir/third-party/ephemeral-port-reserve/ephemeral_port_reserve.py"
     port = port.trim
     command := ["$driver-app_$extension", "--port=$port"]
-    fork-data := pipe.fork
-        true                // use_path
-        pipe.PIPE-INHERITED   // stdin.
-        pipe.PIPE-INHERITED   // stdout
-        pipe.PIPE-INHERITED   // stderr
+    child-process_ = pipe.fork
+        --use-path
         command.first
         command
-    child-process_ = fork-data[3]
     network_ = net.open
     client_ = http.Client network_
 
@@ -106,8 +102,9 @@ class WebDriver:
     print "Started"
 
   close:
-    pid := child-process_
-    if not pid: return
+    child-process := child-process_
+    if not child-process: return
+    pid := child-process.pid
     // Delete the session.
     // This doesn't shut down the driver, but is good practice.
     request := client_.new-request http.DELETE --uri=session-url_
@@ -125,7 +122,7 @@ class WebDriver:
       pipe.kill_ pid 15
     exception := catch --unwind=(: it != DEADLINE-EXCEEDED-ERROR):
       with-timeout --ms=3_000:
-        pipe.wait-for pid
+        child-process.wait
     if exception:
       pipe.kill_ pid 9