diff --git a/courses/rust/projects/project-4/Cargo.lock b/courses/rust/projects/project-4/Cargo.lock
index 0f9f2269..216d9c0b 100644
--- a/courses/rust/projects/project-4/Cargo.lock
+++ b/courses/rust/projects/project-4/Cargo.lock
@@ -107,9 +107,9 @@ dependencies = [
 
 [[package]]
 name = "bumpalo"
-version = "3.6.0"
+version = "3.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "099e596ef14349721d9016f6b80dd3419ea1bf289ab9b44df8e4dfd3a005d5d9"
+checksum = "0d261e256854913907f67ed06efbc3338dfe6179796deefc1ff763fc1aee5535"
 
 [[package]]
 name = "byteorder"