diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 6b62d0c..9bdb59d 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -65,8 +65,13 @@ jobs:
           python-version: '3.12'
 
       - name: Install NumPy
+        if: ${{ matrix.os != 'macos-latest' }}
         run: python3 -m pip install numpy
 
+      - name: Install NumPy on MacOs
+        if: ${{ matrix.os == 'macos-latest' }}
+        run: python3 -m pip install --user --break-system-packages numpy
+
       - name: Run deno test
         run: deno task test
 
diff --git a/README.md b/README.md
index b7df25d..10b48ca 100644
--- a/README.md
+++ b/README.md
@@ -32,12 +32,13 @@ plt.plot(xpoints, ypoints);
 plt.show();
 ```
 
-When running, you **must** specify `--allow-ffi`, `--allow-env` and `--unstable`
-flags. Alternatively, you may also just specify `-A` instead of specific
-permissions since enabling FFI effectively escapes the permissions sandbox.
+When running, you **must** specify `--allow-ffi`, `--allow-env` and
+`--unstable-ffi` flags. Alternatively, you may also just specify `-A` instead of
+specific permissions since enabling FFI effectively escapes the permissions
+sandbox.
 
 ```shell
-deno run -A --unstable <file>
+deno run -A --unstable-ffi <file>
 ```
 
 ### Usage in Bun
diff --git a/deno.json b/deno.json
index 5093226..500bf91 100644
--- a/deno.json
+++ b/deno.json
@@ -1,14 +1,14 @@
 {
   "tasks": {
     "check": "deno task check:mod && deno task check:ext && deno task check:examples",
-    "check:mod": "deno check --unstable mod.ts",
-    "check:ext": "deno check --unstable ext/*.ts",
-    "check:examples": "deno check --unstable examples/*.ts",
-    "test": "deno test --unstable -A test/test.ts",
-    "example:hello_python": "deno run -A --unstable examples/hello_python.ts",
-    "example:matplotlib": "deno run -A --unstable examples/matplotlib.ts",
-    "example:pip_import": "deno run -A --unstable examples/pip_import.ts",
-    "example:run_code": "deno run -A --unstable examples/run_code.ts",
-    "example:tensorflow": "deno run -A --unstable examples/tensorflow.ts"
+    "check:mod": "deno check --unstable-ffi mod.ts",
+    "check:ext": "deno check --unstable-ffi ext/*.ts",
+    "check:examples": "deno check --unstable-ffi examples/*.ts",
+    "test": "deno test --unstable-ffi -A test/test.ts",
+    "example:hello_python": "deno run -A --unstable-ffi examples/hello_python.ts",
+    "example:matplotlib": "deno run -A --unstable-ffi examples/matplotlib.ts",
+    "example:pip_import": "deno run -A --unstable-ffi examples/pip_import.ts",
+    "example:run_code": "deno run -A --unstable-ffi examples/run_code.ts",
+    "example:tensorflow": "deno run -A --unstable-ffi examples/tensorflow.ts"
   }
 }
diff --git a/src/ffi.ts b/src/ffi.ts
index 4f26421..b4367cf 100644
--- a/src/ffi.ts
+++ b/src/ffi.ts
@@ -44,7 +44,7 @@ for (const path of searchPath) {
   } catch (err) {
     if (err instanceof TypeError && !("Bun" in globalThis)) {
       throw new Error(
-        "Cannot load dynamic library because --unstable flag was not set",
+        "Cannot load dynamic library because --unstable-ffi flag was not set",
         { cause: err },
       );
     }