diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5fcdc321..9b3778ac 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -60,13 +60,14 @@ jobs:
           - riscv64gc-unknown-linux-gnu
         toolchain:
           - stable
-          - "1.66.0" # MSRV
+          - "1.77" # MSRV
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
         uses: actions-rs/toolchain@v1
         with:
           toolchain: ${{ matrix.toolchain }}
+          default: true
       - name: Install Rust target
         run: rustup target add ${{ matrix.target }}
       - name: Check source
@@ -96,13 +97,14 @@ jobs:
           - x86_64-unknown-linux-gnu
         toolchain:
           - stable
-          - "1.66.0" # MSRV
+          - "1.77" # MSRV
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
         uses: actions-rs/toolchain@v1
         with:
           toolchain: ${{ matrix.toolchain }}
+          default: true
       - name: Install SoftHSM
         run: |
           sudo apt-get update -y -qq &&
diff --git a/cryptoki-sys/Cargo.toml b/cryptoki-sys/Cargo.toml
index bf0b2636..1c7ff23d 100644
--- a/cryptoki-sys/Cargo.toml
+++ b/cryptoki-sys/Cargo.toml
@@ -10,7 +10,7 @@ categories = ["api-bindings", "external-ffi-bindings", "cryptography", "hardware
 license = "Apache-2.0"
 repository = "https://github.com/parallaxsecond/rust-cryptoki"
 documentation = "https://docs.rs/crate/cryptoki-sys"
-rust-version = "1.66.0"
+rust-version = "1.77"
 
 [build-dependencies]
 bindgen = { version = "0.70.1", optional = true }
diff --git a/cryptoki/Cargo.toml b/cryptoki/Cargo.toml
index 1da0b6d5..fcf1d1ca 100644
--- a/cryptoki/Cargo.toml
+++ b/cryptoki/Cargo.toml
@@ -10,7 +10,7 @@ categories = ["api-bindings", "external-ffi-bindings", "cryptography", "hardware
 license = "Apache-2.0"
 repository = "https://github.com/parallaxsecond/rust-cryptoki"
 documentation = "https://docs.rs/crate/cryptoki"
-rust-version = "1.66.0"
+rust-version = "1.77"
 
 [dependencies]
 bitflags = "1.3"