diff --git a/Cargo.lock b/Cargo.lock
index f9d14a1..04323b6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -291,9 +291,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.4.0"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b631f7e854af39a1739f401cf34a8a013dfe09eac4fa4dba91e9768bd28168d"
+checksum = "260e51e7efe62b592207e9e13a68e43692a7a279171d6ba57abd208bf23645ad"
 
 [[package]]
 name = "pdb"
diff --git a/cargo-asm/Cargo.toml b/cargo-asm/Cargo.toml
index 9dd5cf4..ee386ce 100644
--- a/cargo-asm/Cargo.toml
+++ b/cargo-asm/Cargo.toml
@@ -14,7 +14,7 @@ rustc-demangle = "0.1"
 byteorder = "1.3"
 shellexpand = "2.0"
 cargo_metadata = "0.10"
-once_cell = "1.4.0"
+once_cell = "1.4.1"
 pdb = "0.6"
 cpp_demangle = "0.2"
 termcolor = "1.1"