diff --git a/.github/actions/install/action.yml b/.github/actions/install/action.yml
index ac34cffb..98379b98 100644
--- a/.github/actions/install/action.yml
+++ b/.github/actions/install/action.yml
@@ -17,7 +17,7 @@ inputs:
   zig-v8:
     description: 'zig v8 version to install'
     required: false
-    default: 'v0.1.18'
+    default: 'v0.1.19'
   v8:
     description: 'v8 version to install'
     required: false
diff --git a/Dockerfile b/Dockerfile
index e3c23039..c4ab1282 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ ARG ZIG=0.14.0
 ARG ZIG_MINISIG=RWSGOq2NVecA2UPNdBUZykf1CCb147pkmdtYxgb3Ti+JO/wCYvhbAb/U
 ARG ARCH=x86_64
 ARG V8=11.1.134
-ARG ZIG_V8=v0.1.18
+ARG ZIG_V8=v0.1.19
 
 RUN apt-get update -yq && \
     apt-get install -yq xz-utils \
diff --git a/build.zig.zon b/build.zig.zon
index aa2dda2d..896236da 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -13,8 +13,8 @@
             .hash = "tigerbeetle_io-0.0.0-ViLgxpyRBAB5BMfIcj3KMXfbJzwARs9uSl8aRy2OXULd",
         },
         .v8 = .{
-            .url = "https://github.com/lightpanda-io/zig-v8-fork/archive/97bcfb61da8c97de1321d677a6727a927a9db9a4.tar.gz",
-            .hash = "v8-0.0.0-xddH69DoIADZ8YXZ_EIx_tKdQKEoGsgob_3_ZIi0O_nV",
+            .url = "https://github.com/lightpanda-io/zig-v8-fork/archive/5d46f159ca44535cfb4fccd9d46f719eb7eac5fc.tar.gz",
+            .hash = "v8-0.0.0-xddH66zuIADu8FcQx2kkczC0yhqBY7LoA08-GRWF_zMA",
         },
         //.v8 = .{ .path = "../zig-v8-fork" },
         //.tigerbeetle_io = .{ .path = "../tigerbeetle-io" },
diff --git a/src/browser/browser.zig b/src/browser/browser.zig
index c5f96b36..1be23bd1 100644
--- a/src/browser/browser.zig
+++ b/src/browser/browser.zig
@@ -940,3 +940,14 @@ fn timestamp() u32 {
     const ts = std.posix.clock_gettime(std.posix.CLOCK.MONOTONIC) catch unreachable;
     return @intCast(ts.sec);
 }
+
+const testing = @import("../testing.zig");
+test "Browser" {
+    var runner = try testing.jsRunner(testing.tracking_allocator, .{});
+    defer runner.deinit();
+
+    // this will crash if ICU isn't properly configured / ininitialized
+    try runner.testCases(&.{
+        .{ "new Intl.DateTimeFormat()", "[object Intl.DateTimeFormat]" },
+    }, .{});
+}
diff --git a/src/main.zig b/src/main.zig
index 2dcbfffb..346fedb5 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -65,7 +65,7 @@ pub fn main() !void {
         else => {},
     }
 
-    const platform = Platform.init();
+    const platform = try Platform.init();
     defer platform.deinit();
 
     var app = try App.init(alloc, .{
@@ -423,7 +423,7 @@ var test_wg: std.Thread.WaitGroup = .{};
 test "tests:beforeAll" {
     try parser.init();
     test_wg.startMany(3);
-    _ = Platform.init();
+    _ = try Platform.init();
 
     {
         const address = try std.net.Address.parseIp("127.0.0.1", 9582);
diff --git a/src/main_wpt.zig b/src/main_wpt.zig
index 5f16b954..0c36be3b 100644
--- a/src/main_wpt.zig
+++ b/src/main_wpt.zig
@@ -118,7 +118,7 @@ pub fn main() !void {
     }
 
     // initialize VM JS lib.
-    const platform = Platform.init();
+    const platform = try Platform.init();
     defer platform.deinit();
 
     // prepare libraries to load on each test case.
diff --git a/src/runtime/js.zig b/src/runtime/js.zig
index e1a577c6..6ded6da3 100644
--- a/src/runtime/js.zig
+++ b/src/runtime/js.zig
@@ -34,7 +34,10 @@ const SCOPE_ARENA_RETAIN = 1024 * 64;
 pub const Platform = struct {
     inner: v8.Platform,
 
-    pub fn init() Platform {
+    pub fn init() !Platform {
+        if (v8.initV8ICU() == false) {
+            return error.FailedToInitializeICU;
+        }
         const platform = v8.Platform.initDefault(0, true);
         v8.initV8Platform(platform);
         v8.initV8();