diff --git a/crond/Cargo.toml b/crond/Cargo.toml
index d41873b9..a224044d 100644
--- a/crond/Cargo.toml
+++ b/crond/Cargo.toml
@@ -19,4 +19,4 @@ anyhow = "1.0.82"
 
 [dev-dependencies]
 env_logger = "0.11.3"
-ctor = "0.3.0"
+ctor = "0.4.0"
diff --git a/hocon/Cargo.toml b/hocon/Cargo.toml
index 5cdfe2cf..7f1e2cbd 100644
--- a/hocon/Cargo.toml
+++ b/hocon/Cargo.toml
@@ -21,7 +21,7 @@ chrono = "0.4.38"
 anyhow = "1.0.82"
 
 [dev-dependencies]
-ctor = "0.3.0"
+ctor = "0.4.0"
 rand = "0.9.0"
 env_logger = "0.11.3"
 prop-check-rs = "0.0.831"
diff --git a/parser/Cargo.toml b/parser/Cargo.toml
index b5f76420..e0bc56d8 100644
--- a/parser/Cargo.toml
+++ b/parser/Cargo.toml
@@ -26,7 +26,7 @@ chrono = "0.4.38"
 pom = "3.4.0"
 nom = "7.1.3"
 criterion = { version = "0.5.1", features = [ "html_reports" ]}
-ctor = "0.3.0"
+ctor = "0.4.0"
 pprof = { version = "0.14", features = ["flamegraph", "criterion"] }
 
 [[bench]]
diff --git a/toys/Cargo.toml b/toys/Cargo.toml
index 905d50b8..0f7d50b5 100644
--- a/toys/Cargo.toml
+++ b/toys/Cargo.toml
@@ -16,4 +16,4 @@ oni-comb-parser-rs = { version = "0.0.*", path = "../parser" }
 
 [dev-dependencies]
 env_logger = "0.11.3"
-ctor = "0.3.0"
\ No newline at end of file
+ctor = "0.4.0"
\ No newline at end of file
diff --git a/uri/Cargo.toml b/uri/Cargo.toml
index 6d2856d3..9f5df563 100644
--- a/uri/Cargo.toml
+++ b/uri/Cargo.toml
@@ -17,7 +17,7 @@ oni-comb-parser-rs = { version = "0.0.*", path = "../parser" }
 [dev-dependencies]
 log = "0.4.21"
 env_logger = "0.11.3"
-ctor = "0.3.0"
+ctor = "0.4.0"
 rand = "0.9.0"
 prop-check-rs = "0.0.831"
 anyhow = "1.0.82"