diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7d86e1e7..de8c9d27 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -118,9 +118,12 @@ jobs:
           # portable.
           # Specifically choose `aarch64-pc-windows-msvc` since it was new in
           # *ring* 0.17.
+          - aarch64-apple-darwin
           - aarch64-pc-windows-msvc
           - arm-unknown-linux-gnueabihf
           - i686-pc-windows-msvc
+          - riscv64gc-unknown-linux-gnu
+          - wasm32-wasi
           - x86_64-unknown-linux-musl
           - x86_64-unknown-linux-gnu
 
@@ -137,6 +140,9 @@ jobs:
           - beta
 
         include:
+          - target: aarch64-apple-darwin
+            host_os: macos-13-xlarge
+
           - target: aarch64-pc-windows-msvc
             host_os: windows-latest
             # GitHub Actions doesn't have a way to run this target yet.
@@ -148,6 +154,12 @@ jobs:
           - target: i686-pc-windows-msvc
             host_os: windows-latest
 
+          - target: riscv64gc-unknown-linux-gnu
+            host_os: ubuntu-22.04
+
+          - target: wasm32-wasi
+            host_os: ubuntu-22.04
+
           - target: x86_64-unknown-linux-musl
             host_os: ubuntu-22.04