diff --git a/Cargo.lock b/Cargo.lock
index df6ee87bb..799c7a440 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -676,9 +676,9 @@ checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
 [[package]]
 name = "base64ct"
-version = "1.7.3"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89e25b6adfb930f02d1981565a6e5d9c547ac15a96606256d3b59040e5cd4ca3"
+checksum = "55248b47b0caf0546f7988906588779981c43bb1bc9d0c44087278f80cdb44ba"
 
 [[package]]
 name = "bcrypt"
@@ -3035,7 +3035,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc2f4eb4bc735547cfed7c0a4922cbd04a4655978c09b54f1f7b228750664c34"
 dependencies = [
  "cfg-if",
- "windows-targets 0.48.5",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -7367,7 +7367,7 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf221c93e13a30d793f7645a0e7762c55d169dbb0a49671918a2319d289b10bb"
 dependencies = [
- "windows-sys 0.48.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index f05e53f37..407720da8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -94,7 +94,7 @@ features = ["cookie-private", "cookie-key-expansion", "typed-header"]
 
 # Constant-time base64
 [workspace.dependencies.base64ct]
-version = "1.7.3"
+version = "1.8.0"
 
 # Packed bitfields
 [workspace.dependencies.bitflags]
diff --git a/crates/jose/Cargo.toml b/crates/jose/Cargo.toml
index 7b3f6cbee..10989baf5 100644
--- a/crates/jose/Cargo.toml
+++ b/crates/jose/Cargo.toml
@@ -12,7 +12,7 @@ repository.workspace = true
 workspace = true
 
 [dependencies]
-base64ct = { version = "1.7.3", features = ["std"] }
+base64ct = { version = "1.8.0", features = ["std"] }
 chrono.workspace = true
 digest = "0.10.7"
 ecdsa = { version = "0.16.9", features = ["signing", "verifying"] }
diff --git a/crates/keystore/Cargo.toml b/crates/keystore/Cargo.toml
index 00c79ecc1..a46b816f6 100644
--- a/crates/keystore/Cargo.toml
+++ b/crates/keystore/Cargo.toml
@@ -29,7 +29,7 @@ spki = { version = "0.7.3", features = ["std"] }
 thiserror.workspace = true
 generic-array = "0.14.7"
 chacha20poly1305 = { version = "0.10.1", features = ["std"] }
-base64ct = "1.7.3"
+base64ct = "1.8.0"
 
 mas-iana.workspace = true
 mas-jose.workspace = true
diff --git a/crates/oidc-client/Cargo.toml b/crates/oidc-client/Cargo.toml
index df549b588..95f01193a 100644
--- a/crates/oidc-client/Cargo.toml
+++ b/crates/oidc-client/Cargo.toml
@@ -13,7 +13,7 @@ workspace = true
 
 [dependencies]
 async-trait.workspace = true
-base64ct = { version = "1.7.3", features = ["std"] }
+base64ct = { version = "1.8.0", features = ["std"] }
 chrono.workspace = true
 elliptic-curve.workspace = true
 form_urlencoded = "1.2.1"