diff --git a/Cargo.lock b/Cargo.lock
index e095e648..9e5a350a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -270,9 +270,9 @@ dependencies = [
 
 [[package]]
 name = "ctr"
-version = "0.10.0-rc.3"
+version = "0.10.0-rc.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "65ea71550d18331d179854662ab330bb54306b9b56020d0466aae2a58f4e17c1"
+checksum = "fee683dd898fbd052617b4514bc31f98bc32081a83b69ec46adef3b1ef4ae36f"
 dependencies = [
  "cipher",
 ]
diff --git a/aes-gcm-siv/Cargo.toml b/aes-gcm-siv/Cargo.toml
index a7de31f6..7705e0e4 100644
--- a/aes-gcm-siv/Cargo.toml
+++ b/aes-gcm-siv/Cargo.toml
@@ -20,7 +20,7 @@ rust-version = "1.85"
 aead = { version = "0.6.0-rc.10", default-features = false }
 aes = { version = "0.9.0-rc.4", optional = true }
 cipher = "0.5"
-ctr = "0.10.0-rc.3"
+ctr = "0.10.0-rc.4"
 polyval = { version = "0.7.0-rc.7", default-features = false }
 subtle = { version = "2", default-features = false }
 zeroize = { version = "1", optional = true, default-features = false }
diff --git a/aes-gcm/Cargo.toml b/aes-gcm/Cargo.toml
index 83bed64c..cb26f3c7 100644
--- a/aes-gcm/Cargo.toml
+++ b/aes-gcm/Cargo.toml
@@ -19,7 +19,7 @@ rust-version = "1.85"
 [dependencies]
 aead = { version = "0.6.0-rc.10", default-features = false }
 cipher = "0.5"
-ctr = "0.10.0-rc.3"
+ctr = "0.10.0-rc.4"
 ghash = { version = "0.6.0-rc.6", default-features = false }
 subtle = { version = "2", default-features = false }
 
diff --git a/aes-siv/Cargo.toml b/aes-siv/Cargo.toml
index b209404f..78b2e68c 100644
--- a/aes-siv/Cargo.toml
+++ b/aes-siv/Cargo.toml
@@ -21,7 +21,7 @@ aead = "0.6.0-rc.10"
 aes = "0.9.0-rc.4"
 cipher = "0.5"
 cmac = "0.8.0-rc.4"
-ctr = "0.10.0-rc.3"
+ctr = "0.10.0-rc.4"
 dbl = "0.5"
 digest = { version = "0.11.0-rc.11", features = ["mac"] }
 
diff --git a/ccm/Cargo.toml b/ccm/Cargo.toml
index c8b7b59c..1ba4502a 100644
--- a/ccm/Cargo.toml
+++ b/ccm/Cargo.toml
@@ -16,7 +16,7 @@ rust-version = "1.85"
 [dependencies]
 aead = { version = "0.6.0-rc.10", default-features = false }
 cipher = { version = "0.5", default-features = false }
-ctr = { version = "0.10.0-rc.3", default-features = false }
+ctr = { version = "0.10.0-rc.4", default-features = false }
 subtle = { version = "2", default-features = false }
 
 [dev-dependencies]
diff --git a/eax/Cargo.toml b/eax/Cargo.toml
index 89c91d3d..9ab0002c 100644
--- a/eax/Cargo.toml
+++ b/eax/Cargo.toml
@@ -23,7 +23,7 @@ rust-version = "1.85"
 aead = { version = "0.6.0-rc.10", default-features = false }
 cipher = "0.5"
 cmac = "0.8.0-rc.3"
-ctr = "0.10.0-rc.3"
+ctr = "0.10.0-rc.4"
 subtle = { version = "2", default-features = false }
 
 [dev-dependencies]
diff --git a/ocb3/Cargo.toml b/ocb3/Cargo.toml
index 6e75711f..f2d27370 100644
--- a/ocb3/Cargo.toml
+++ b/ocb3/Cargo.toml
@@ -18,7 +18,7 @@ rust-version = "1.85"
 [dependencies]
 aead = { version = "0.6.0-rc.10", default-features = false }
 cipher = "0.5"
-ctr = "0.10.0-rc.3"
+ctr = "0.10.0-rc.4"
 dbl = "0.5"
 subtle = { version = "2", default-features = false }
 aead-stream = { version = "0.6.0-rc.3", optional = true, default-features = false }