diff --git a/Cargo.lock b/Cargo.lock
index 37e5085b7..cd3013409 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -62,9 +62,9 @@ dependencies = [
 
 [[package]]
 name = "blobby"
-version = "0.4.0-pre.1"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e4db6eec520c1f3d3b060c5b67527c3d1d4122d9f0ff47edf0149a7ffa34cebb"
+checksum = "89af0b093cc13baa4e51e64e65ec2422f7e73aea0e612e5ad3872986671622f1"
 
 [[package]]
 name = "block-buffer"
@@ -311,9 +311,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.176"
+version = "0.2.177"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "58f929b4d672ea937a23a1ab494143d968337a5f47e56d0815df1e0890ddf174"
+checksum = "2874a2af47a2325c2001a6e6fad9b16a53b802102b528163885171cf92b15976"
 
 [[package]]
 name = "num-bigint"