diff --git a/polling_serial/Cargo.toml b/polling_serial/Cargo.toml
index f74132e..6c97226 100644
--- a/polling_serial/Cargo.toml
+++ b/polling_serial/Cargo.toml
@@ -7,8 +7,8 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-x86_64 = "0.12.2"
-spin = "0.5.2"
+x86_64 = "0.14.1"
+spin = "0.9.0"
 
 [dependencies.lazy_static]
 version = "1.4.0"
diff --git a/vga_buffer/Cargo.toml b/vga_buffer/Cargo.toml
index fed47de..2c2727e 100644
--- a/vga_buffer/Cargo.toml
+++ b/vga_buffer/Cargo.toml
@@ -7,8 +7,8 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-volatile = "0.3.0"
-spin = "0.5.2"
+volatile = "0.2.6"
+spin = "0.9.0"
 
 [dependencies.lazy_static]
 version = "1.4.0"