diff --git a/pyproject.toml b/pyproject.toml
index 549382d..5be6b5f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,9 +19,10 @@ sources = ["src/testbed"]
 test_sources = ["tests"]
 
 requires = [
-    "cryptography",
-    "lru_dict",
-    "pillow",
+    # Skip binary dependencies on mobile for Python 3.14
+    "cryptography; (platform_system != 'iOS' and platform_system != 'Android') or python_version < '3.14'",
+    "lru_dict; (platform_system != 'iOS' and platform_system != 'Android') or python_version < '3.14'",
+    "pillow; (platform_system != 'iOS' and platform_system != 'Android') or python_version < '3.14'",
     # Numpy/pandas aren't available for iOS on 3.13+, or at all on 3.14.
     "numpy; python_version < '3.13' or (platform_system != 'iOS' and python_version < '3.14')",
     "pandas; python_version < '3.13' or (platform_system != 'iOS' and python_version < '3.14')",