diff --git a/moon/Cargo.lock b/moon/Cargo.lock
index 3ba98207..16f90767 100644
--- a/moon/Cargo.lock
+++ b/moon/Cargo.lock
@@ -2,6 +2,22 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "lock_api"
+version = "0.4.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "435011366fe56583b16cf956f9df0095b405b82d76425bc8981c0e22e60ec4df"
+dependencies = [
+ "autocfg",
+ "scopeguard",
+]
+
 [[package]]
 name = "moon"
 version = "0.1.0"
@@ -10,7 +26,16 @@ dependencies = [
 ]
 
 [[package]]
-name = "spin"
-version = "0.5.2"
+name = "scopeguard"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
+checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
+
+[[package]]
+name = "spin"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f6002a767bff9e83f8eeecf883ecb8011875a21ae8da43bffb817a57e78cc09"
+dependencies = [
+ "lock_api",
+]
diff --git a/moon/Cargo.toml b/moon/Cargo.toml
index a17e3710..03d9ebd1 100644
--- a/moon/Cargo.toml
+++ b/moon/Cargo.toml
@@ -16,4 +16,4 @@ strip = "debuginfo"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-spin = "0.5.2"
\ No newline at end of file
+spin = "0.9.4"
\ No newline at end of file