diff --git a/Cargo.toml b/Cargo.toml
index 4b22aee2ba..2e819f68a9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,14 +27,12 @@ git = "https://github.com/servo/ipc-channel"
 [dependencies.webrender_traits]
 git = "https://github.com/servo/webrender_traits"
 
-[dependencies.offscreen_gl_context]
-git = "https://github.com/ecoal95/rust-offscreen-rendering-context"
-
 #[dependencies.notify]
 #git = "https://github.com/glennw/rsnotify.git"
 #branch = "inotify-modify"
 
 [dependencies]
+offscreen_gl_context = {version = "0.1.1", features = ["serde_serialization"]}
 gleam = "0.2"
 euclid = {version = "0.6.2", features = ["plugins"]}
 num = {version = "0.1.31", default-features = false}
diff --git a/appveyor.yml b/appveyor.yml
new file mode 100644
index 0000000000..f82a3036cf
--- /dev/null
+++ b/appveyor.yml
@@ -0,0 +1,14 @@
+environment:
+  PATH: '%PATH%;C:\msys64\mingw64\bin;C:\Rust\bin'
+
+install:
+  - ps: Start-FileDownload "https://static.rust-lang.org/dist/rust-nightly-x86_64-pc-windows-gnu.msi"
+  - msiexec /passive /i "rust-nightly-x86_64-pc-windows-gnu.msi" ADDLOCAL=Rustc,Cargo,Std INSTALLDIR=C:\Rust
+  - C:\msys64\usr\bin\bash -lc "pacman -S --noconfirm mingw-w64-x86_64-freetype"
+  - rustc -V
+  - cargo -V
+
+build: false
+
+test_script:
+  - cargo test --verbose
diff --git a/src/render_backend.rs b/src/render_backend.rs
index f059e0d98d..bdff41a70b 100644
--- a/src/render_backend.rs
+++ b/src/render_backend.rs
@@ -217,12 +217,14 @@ impl RenderBackend {
                                             (draw_buffer.size(), draw_buffer.get_bound_texture_id().unwrap())
                                         };
 
+                                        let limits = ctx.borrow_limits().clone();
+
                                         self.webgl_contexts.insert(id, ctx);
 
                                         self.resource_cache
                                             .add_webgl_texture(id, TextureId(texture_id), real_size);
 
-                                        tx.send(Ok(id)).unwrap();
+                                        tx.send(Ok((id, limits))).unwrap();
                                     },
                                     Err(msg) => {
                                         tx.send(Err(msg.to_owned())).unwrap();