diff --git a/Cargo.lock b/Cargo.lock
index b12326f0a1..eb8269a6c2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -732,9 +732,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.4.1"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "260e51e7efe62b592207e9e13a68e43692a7a279171d6ba57abd208bf23645ad"
+checksum = "95c43eba5c640051fbde86a3377842386a94281df3ff0a5f0365c2075ed5c66f"
 
 [[package]]
 name = "oorandom"
diff --git a/boa/Cargo.toml b/boa/Cargo.toml
index ec349423b1..ead77b9a00 100644
--- a/boa/Cargo.toml
+++ b/boa/Cargo.toml
@@ -33,7 +33,7 @@ chrono = "0.4.19"
 # Optional Dependencies
 serde = { version = "1.0.117", features = ["derive"], optional = true }
 measureme = { version = "9.0.0", optional = true }
-once_cell = { version = "1.4.1", optional = true }
+once_cell = { version = "1.5.0", optional = true }
 
 [dev-dependencies]
 criterion = "0.3.3"
diff --git a/boa_tester/Cargo.toml b/boa_tester/Cargo.toml
index 71d81d23c9..fbd5e4684c 100644
--- a/boa_tester/Cargo.toml
+++ b/boa_tester/Cargo.toml
@@ -18,7 +18,7 @@ serde_yaml = "0.8.14"
 serde_json = "1.0.59"
 bitflags = "1.2.1"
 regex = "1.4.2"
-once_cell = "1.4.1"
+once_cell = "1.5.0"
 colored = "2.0.0"
 fxhash = "0.2.1"
 git2 = "0.13.12"