diff --git a/contracts/liquidity_book/rustfmt.toml b/contracts/liquidity_book/rustfmt.toml
new file mode 100644
index 00000000..93b23e8d
--- /dev/null
+++ b/contracts/liquidity_book/rustfmt.toml
@@ -0,0 +1,7 @@
+# https://github.com/rust-lang/rustfmt/blob/master/Configurations.md
+
+# Stable configurations
+edition = "2021"
+max_width = 100
+merge_derives = true
+use_field_init_shorthand = true
diff --git a/packages/lb_libraries/rustfmt.toml b/packages/lb_libraries/rustfmt.toml
new file mode 100644
index 00000000..93b23e8d
--- /dev/null
+++ b/packages/lb_libraries/rustfmt.toml
@@ -0,0 +1,7 @@
+# https://github.com/rust-lang/rustfmt/blob/master/Configurations.md
+
+# Stable configurations
+edition = "2021"
+max_width = 100
+merge_derives = true
+use_field_init_shorthand = true