diff --git a/Cargo.lock b/Cargo.lock
index a8b97ff26f5f..3bf3fd361dfd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3957,9 +3957,9 @@ checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
 
 [[package]]
 name = "libc"
-version = "0.2.88"
+version = "0.2.121"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "03b07a082330a35e43f63177cc01689da34fbffa0105e1246cf0311472cac73a"
+checksum = "efaa7b300f3b5fe8eb6bf21ce3895e1751d9665086af2d64b42f19701015ff4f"
 
 [[package]]
 name = "libfuzzer-sys"
@@ -5310,7 +5310,7 @@ dependencies = [
  "prost",
  "prost-types",
  "tempfile",
- "which 4.0.2",
+ "which 4.2.5",
 ]
 
 [[package]]
@@ -7420,7 +7420,7 @@ dependencies = [
  "structopt 0.3.21",
  "tempfile",
  "textwrap 0.13.4",
- "which 4.0.2",
+ "which 4.2.5",
 ]
 
 [[package]]
@@ -7890,12 +7890,13 @@ dependencies = [
 
 [[package]]
 name = "which"
-version = "4.0.2"
+version = "4.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87c14ef7e1b8b8ecfc75d5eca37949410046e66f15d185c01d70824f1f8111ef"
+checksum = "5c4fb54e6113b6a8772ee41c3404fb0301ac79604489467e0a9ce1f3e97c24ae"
 dependencies = [
+ "either",
+ "lazy_static",
  "libc",
- "thiserror",
 ]
 
 [[package]]
diff --git a/language/transaction-builder/generator/Cargo.toml b/language/transaction-builder/generator/Cargo.toml
index ed7898bba66b..b76dbdea25cf 100644
--- a/language/transaction-builder/generator/Cargo.toml
+++ b/language/transaction-builder/generator/Cargo.toml
@@ -26,7 +26,7 @@ bcs = "0.1.2"
 
 [dev-dependencies]
 tempfile = "3.2.0"
-which = "4.0.2"
+which = "4.2.5"
 
 [features]
 default = []