diff --git a/.github/workflows/pkcs5.yml b/.github/workflows/pkcs5.yml
index ffc1348fe..537280507 100644
--- a/.github/workflows/pkcs5.yml
+++ b/.github/workflows/pkcs5.yml
@@ -43,12 +43,12 @@ jobs:
           toolchain: ${{ matrix.rust }}
           targets: ${{ matrix.target }}
       - uses: RustCrypto/actions/cargo-hack-install@master
-      - run: cargo hack build --target ${{ matrix.target }} --feature-powerset --exclude-features getrandom,std
+      - run: cargo hack build --target ${{ matrix.target }} --feature-powerset --exclude-features getrandom
 
   minimal-versions:
     uses: RustCrypto/actions/.github/workflows/minimal-versions.yml@master
     with:
-        working-directory: ${{ github.workflow }}
+      working-directory: ${{ github.workflow }}
 
   test:
     runs-on: ubuntu-latest
diff --git a/Cargo.lock b/Cargo.lock
index 6ecb6d624..003ff7a42 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -968,9 +968,9 @@ dependencies = [
 
 [[package]]
 name = "pbkdf2"
-version = "0.13.0-rc.10"
+version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f24f3eb2f4471b1730d59e4b730b747939960a8c7eb0c33c5a9076f2d3dddea"
+checksum = "112d82ceb8c5bf524d9af484d4e4970c9fd5a0cc15ba14ad93dccd28873b0629"
 dependencies = [
  "digest",
  "hmac",
@@ -1438,9 +1438,9 @@ checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
 [[package]]
 name = "scrypt"
-version = "0.12.0-rc.10"
+version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e03ed5b54ed5fcc8e016cd94301416bc2c01c05c87a6742b97468337c8804598"
+checksum = "d87af57419b594aa23fa95f09f0e06d80d84ba01c26148c43844cad6ff4485f0"
 dependencies = [
  "cfg-if",
  "pbkdf2",
diff --git a/pkcs5/Cargo.toml b/pkcs5/Cargo.toml
index 72e2d4979..3dacf9805 100644
--- a/pkcs5/Cargo.toml
+++ b/pkcs5/Cargo.toml
@@ -34,7 +34,6 @@ hex-literal = "1"
 
 [features]
 alloc = []
-std = []
 
 3des = ["dep:des", "pbes2"]
 des-insecure = ["dep:des", "pbes2"]
diff --git a/pkcs5/src/error.rs b/pkcs5/src/error.rs
index 050da6a38..a12068958 100644
--- a/pkcs5/src/error.rs
+++ b/pkcs5/src/error.rs
@@ -36,8 +36,7 @@ pub enum Error {
     },
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for Error {}
+impl core::error::Error for Error {}
 
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
diff --git a/pkcs5/src/lib.rs b/pkcs5/src/lib.rs
index 3bb1d4b8b..97cdbc2d4 100644
--- a/pkcs5/src/lib.rs
+++ b/pkcs5/src/lib.rs
@@ -29,9 +29,6 @@
 #[cfg(all(feature = "alloc", feature = "pbes2"))]
 extern crate alloc;
 
-#[cfg(feature = "std")]
-extern crate std;
-
 mod error;
 
 pub mod pbes1;