diff --git a/Cargo.lock b/Cargo.lock
index c898dfc..036d161 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1931,9 +1931,9 @@ checksum = "17b02fc0ff9a9e4b35b3342880f48e896ebf69f2967921fe8646bf5b7125956a"
 
 [[package]]
 name = "once_cell"
-version = "1.8.0"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "692fcb63b64b1758029e0a96ee63e049ce8c5948587f2f7208df04625e5f6b56"
+checksum = "da32515d9f6e6e489d7bc9d84c71b060db7247dc035bbe44eac88cf87486d8d5"
 
 [[package]]
 name = "opaque-debug"
diff --git a/lychee-bin/Cargo.toml b/lychee-bin/Cargo.toml
index 742503e..58dddd7 100644
--- a/lychee-bin/Cargo.toml
+++ b/lychee-bin/Cargo.toml
@@ -41,7 +41,7 @@ tokio = { version = "1.14.0", features = ["full"] }
 toml = "0.5.8"
 futures = "0.3.17"
 tokio-stream = "0.1.7"
-once_cell = "1.8.0"
+once_cell = "1.9.0"
 
 [dev-dependencies]
 assert_cmd = "2.0.2"
diff --git a/lychee-lib/Cargo.toml b/lychee-lib/Cargo.toml
index c94534c..e1aadfc 100644
--- a/lychee-lib/Cargo.toml
+++ b/lychee-lib/Cargo.toml
@@ -45,7 +45,7 @@ percent-encoding = "2.1.0"
 async-stream = "0.3.2"
 jwalk = "0.6.0"
 cached = "0.26.2"
-once_cell = "1.8.0"
+once_cell = "1.9.0"
 thiserror = "1.0"
 futures = "0.3.18"