--- a/rust/Cargo.lock	Thu Sep 16 16:42:16 2021 -0700
+++ b/rust/Cargo.lock	Fri Sep 17 08:57:12 2021 +0200
@@ -1,5 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+
 [[package]]
 name = "adler"
 version = "0.2.3"
@@ -511,11 +512,12 @@
 
 [[package]]
 name = "memmap2"
-version = "0.3.1"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "00b6c2ebff6180198788f5db08d7ce3bc1d0b617176678831a7510825973e357"
+checksum = "de5d3112c080d58ce560081baeaab7e1e864ca21795ddbf533d5b1842bb1ecf8"
 dependencies = [
  "libc",
+ "stable_deref_trait",
 ]
 
 [[package]]