diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 5393e06a..72c3d752 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -23,11 +23,11 @@ jobs:
           - --features serde
         toolchain:
           - stable
-          - 1.65.0
+          - 1.70.0
     name: test
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@main
 
       - name: Install ${{ matrix.toolchain }} toolchain
         uses: actions-rs/toolchain@v1
@@ -63,8 +63,8 @@ jobs:
           - curve25519,ristretto255-voprf
           - curve25519
     steps:
-      - uses: actions/checkout@v3
-      - uses: hecrj/setup-rust-action@v1
+      - uses: actions/checkout@main
+      - uses: hecrj/setup-rust-action@v2
       - run: cargo install cross
       # Note: just use `cross` as you would `cargo`, but always
       # pass the `--target=${{ matrix.target }}` arg. (Yes, really).
@@ -78,13 +78,13 @@ jobs:
       matrix:
         toolchain:
           - stable
-          - 1.65.0
+          - 1.70.0
     name: test simple_login command-line example
     steps:
       - name: install expect
         run: sudo apt-get install expect
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@main
       - name: install rust
         uses: actions-rs/toolchain@v1
         with:
@@ -101,13 +101,13 @@ jobs:
       matrix:
         toolchain:
           - stable
-          - 1.65.0
+          - 1.70.0
     name: test digital_locker command-line example
     steps:
       - name: install expect
         run: sudo apt-get install expect
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@main
       - name: install rust
         uses: actions-rs/toolchain@v1
         with:
@@ -137,8 +137,8 @@ jobs:
           - argon2
           - serde
     steps:
-      - uses: actions/checkout@v3
-      - uses: hecrj/setup-rust-action@v1
+      - uses: actions/checkout@main
+      - uses: hecrj/setup-rust-action@v2
       - run: rustup target add ${{ matrix.target }}
       - run: cargo build --verbose --target=${{ matrix.target }} --no-default-features --features ${{ matrix.frontend_feature }},${{ matrix.backend_feature }}
 
@@ -155,7 +155,7 @@ jobs:
           - --features curve25519
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@main
 
       - name: Install stable toolchain
         uses: actions-rs/toolchain@v1
@@ -175,7 +175,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@main
 
       - name: Install stable toolchain
         uses: actions-rs/toolchain@v1
@@ -204,7 +204,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@main
 
       - name: Install nightly toolchain
         uses: actions-rs/toolchain@v1
@@ -239,7 +239,7 @@ jobs:
         run: cargo install taplo-cli --locked 
 
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@main
 
       - name: Run Taplo
         run: taplo fmt --check
@@ -248,5 +248,5 @@ jobs:
     name: cargo-deny check
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@main
       - uses: EmbarkStudios/cargo-deny-action@v1
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 8429f019..30aa7419 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -11,12 +11,13 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
+        rust: [stable]
 
     steps:
-    - uses: hecrj/setup-rust-action@v1
+    - uses: hecrj/setup-rust-action@v2
       with:
         rust-version: ${{ matrix.rust }}
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@main
     - name: Login to crates.io
       run: cargo login $CRATES_IO_TOKEN
       env:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1596701a..7d70afe0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## 3.0.0-pre.5 (TBD)
+* Increased MSRV to 1.70
+
 ## 3.0.0-pre.4 (July 25, 2023)
 * Updated voprf and curve25519-dalek dependencies
 
diff --git a/Cargo.toml b/Cargo.toml
index 7b7fedfc..b4609755 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,8 +8,8 @@ license = "Apache-2.0 OR MIT"
 name = "opaque-ke"
 readme = "README.md"
 repository = "https://github.com/facebook/opaque-ke"
-rust-version = "1.65"
-version = "3.0.0-pre.4"
+rust-version = "1.70"
+version = "3.0.0-pre.5"
 
 [features]
 argon2 = ["dep:argon2"]
diff --git a/README.md b/README.md
index 6b235706..fcc52043 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ opaque-ke = "3.0.0-pre.4"
 
 ### Minimum Supported Rust Version
 
-Rust **1.65** or higher.
+Rust **1.70** or higher.
 
 Audit
 -----