diff --git a/Cargo.lock b/Cargo.lock
index d8284567b7..a8e627e386 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1453,12 +1453,6 @@ dependencies = [
  "vcpkg",
 ]
 
-[[package]]
-name = "linked-hash-map"
-version = "0.5.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0717cef1bc8b636c6e1c1bbdefc09e6322da8a9321966e8928ef80d20f7f770f"
-
 [[package]]
 name = "linux-raw-sys"
 version = "0.3.1"
@@ -2388,14 +2382,15 @@ dependencies = [
 
 [[package]]
 name = "serde_yaml"
-version = "0.8.26"
+version = "0.9.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "578a7433b776b56a35785ed5ce9a7e777ac0598aac5a6dd1b4b18a307c7fc71b"
+checksum = "d9d684e3ec7de3bf5466b32bd75303ac16f0736426e5a4e0d6e489559ce1249c"
 dependencies = [
  "indexmap",
+ "itoa",
  "ryu",
  "serde",
- "yaml-rust",
+ "unsafe-libyaml",
 ]
 
 [[package]]
@@ -3497,6 +3492,12 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
 
+[[package]]
+name = "unsafe-libyaml"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1865806a559042e51ab5414598446a5871b561d21b6764f2eabb0dd481d880a6"
+
 [[package]]
 name = "untrusted"
 version = "0.7.1"
@@ -3853,15 +3854,6 @@ dependencies = [
  "winapi",
 ]
 
-[[package]]
-name = "yaml-rust"
-version = "0.4.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56c1936c4cc7a1c9ab21a1ebb602eb942ba868cbd44a99cb7cdc5892335e1c85"
-dependencies = [
- "linked-hash-map",
-]
-
 [[package]]
 name = "zip"
 version = "0.6.4"
diff --git a/compiler/compiler/Cargo.toml b/compiler/compiler/Cargo.toml
index 5cc3a23c3e..86307bdb4b 100644
--- a/compiler/compiler/Cargo.toml
+++ b/compiler/compiler/Cargo.toml
@@ -62,7 +62,7 @@ version = "1.0.160"
 features = [ "derive" ]
 
 [dev-dependencies.serde_yaml]
-version = "0.8.25"
+version = "0.9.21"
 
 [dev-dependencies.tempfile]
 version = "3.5"
diff --git a/compiler/parser/Cargo.toml b/compiler/parser/Cargo.toml
index 37455f37cc..340b6b0aa2 100644
--- a/compiler/parser/Cargo.toml
+++ b/compiler/parser/Cargo.toml
@@ -64,7 +64,7 @@ version = "1.0"
 features = [ "preserve_order" ]
 
 [dev-dependencies.serde_yaml]
-version = "0.8"
+version = "0.9"
 
 [features]
 default = [ ]
diff --git a/tests/test-framework/Cargo.toml b/tests/test-framework/Cargo.toml
index f5f5842078..5e30c7dbb2 100644
--- a/tests/test-framework/Cargo.toml
+++ b/tests/test-framework/Cargo.toml
@@ -42,7 +42,7 @@ version = "1.0"
 features = [ "preserve_order" ]
 
 [dependencies.serde_yaml]
-version = "0.8"
+version = "0.9"
 
 [dependencies.walkdir]
 version = "2.3"