diff --git a/Cargo.toml b/Cargo.toml
index b7849720..47f9b010 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -97,7 +97,6 @@ semicolon_if_nothing_returned = "warn"
 trivially_copy_pass_by_ref = "warn"
 std_instead_of_alloc = "warn"
 std_instead_of_core = "warn"
-undocumented_unsafe_blocks = "warn"
 unnecessary_safety_comment = "warn"
 unwrap_in_result = "warn"
 unwrap_used = "warn"
@@ -108,6 +107,7 @@ missing_debug_implementations = "warn"
 missing_docs = "warn"
 trivial_casts = "warn"
 trivial_numeric_casts = "warn"
+unsafe_code = "forbid"
 unused_lifetimes = "warn"
 unused_qualifications = "warn"