diff --git a/bellman/Cargo.lock b/bellman/Cargo.lock
index f2cfcf67..fe61fb1e 100644
--- a/bellman/Cargo.lock
+++ b/bellman/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "arrayvec"
 version = "0.4.12"
@@ -100,9 +102,9 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-deque"
-version = "0.7.3"
+version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f02af974daeee82218205558e51ec8768b48cf524bd01d550abe5573a608285"
+checksum = "c20ff29ded3204c5106278a81a38f4b482636ed4fa1e6cfbeef193291beb29ed"
 dependencies = [
  "crossbeam-epoch",
  "crossbeam-utils",