diff --git a/pyproject.toml b/pyproject.toml
index 6d82246877..4aeb0102e6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -47,8 +47,8 @@ dependencies = []
 
 [project.optional-dependencies]
 default = [
-    "brotli; implementation_name=='cpython'",
-    "brotlicffi; implementation_name!='cpython'",
+    "brotli; implementation_name=='cpython' and sys_platform!='ios'",
+    "brotlicffi; implementation_name!='cpython' and sys_platform!='ios'",
     "certifi",
     "mutagen",
     "pycryptodomex",