diff --git a/Cargo.lock b/Cargo.lock
index 6691eac..9ee01a6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -724,7 +724,7 @@ dependencies = [
  "rustc-hash 1.1.0",
  "shlex",
  "syn",
- "which",
+ "which 4.4.2",
 ]
 
 [[package]]
@@ -2763,7 +2763,7 @@ dependencies = [
  "thiserror 2.0.18",
  "tokio",
  "tracing",
- "which",
+ "which 8.0.2",
 ]
 
 [[package]]
@@ -9585,6 +9585,15 @@ dependencies = [
  "rustix 0.38.44",
 ]
 
+[[package]]
+name = "which"
+version = "8.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "81995fafaaaf6ae47a7d0cc83c67caf92aeb7e5331650ae6ff856f7c0c60c459"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "whoami"
 version = "2.1.2"
diff --git a/crates/forge-tts-espeak/Cargo.toml b/crates/forge-tts-espeak/Cargo.toml
index ce89ada..c13aef0 100644
--- a/crates/forge-tts-espeak/Cargo.toml
+++ b/crates/forge-tts-espeak/Cargo.toml
@@ -16,7 +16,7 @@ tracing = { workspace = true }
 
 [dev-dependencies]
 tokio = { workspace = true, features = ["rt", "macros"] }
-which = { version = "4" }
+which = { version = "8" }
 
 [lints]
 workspace = true