diff --git a/apps/sgx/enclave/.rustfmt.toml b/apps/sgx/enclave/.rustfmt.toml
index b3d2623694f0..9ae87cc6bfcf 100644
--- a/apps/sgx/enclave/.rustfmt.toml
+++ b/apps/sgx/enclave/.rustfmt.toml
@@ -38,14 +38,14 @@ trailing_comma = "Vertical"
 match_block_trailing_comma = true
 blank_lines_upper_bound = 1
 blank_lines_lower_bound = 0
-edition = "Edition2015"
+edition = "2015"
 merge_derives = true
 use_try_shorthand = true
 use_field_init_shorthand = false
 force_explicit_abi = true
 condense_wildcard_suffixes = true
 color = "Auto"
-required_version = "0.99.4"
+required_version = "0.99.5"
 unstable_features = false
 disable_all_formatting = false
 skip_children = false