diff --git a/Cargo.toml b/Cargo.toml
index c92476d..70ed1df 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -51,6 +51,7 @@ incremental = true
 
 [profile.release]
 lto = "fat"
+incremental = true
 codegen-units = 1
 
 # For releases also try to max optimizations for dependencies:
@@ -58,3 +59,4 @@ codegen-units = 1
 opt-level = 3
 [profile.release.package."*"]
 opt-level = 3
+
diff --git a/rustfmt.toml b/rustfmt.toml
index 6e48dc7..8e8627b 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -1,4 +1,3 @@
-unstable_features = true
 binop_separator = "Front"
 blank_lines_lower_bound = 0
 blank_lines_upper_bound = 1
@@ -50,6 +49,7 @@ reorder_imports = true
 reorder_modules = true
 report_fixme = "Always"
 report_todo = "Always"
+required_version = "1.4.37"
 skip_children = false
 space_after_colon = true
 space_before_colon = false
@@ -60,6 +60,7 @@ tab_spaces = 4
 trailing_comma = "Vertical"
 trailing_semicolon = true
 type_punctuation_density = "Wide"
+unstable_features = false
 use_field_init_shorthand = false
 use_small_heuristics = "Default"
 use_try_shorthand = false