diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c942a2e..f7efd33 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -67,20 +67,19 @@ jobs:
           command: fmt
           args: --all -- --check
 
-  # Enable this once x25519-dalek has another 2.0-pre.X release
-  #msrv:
-  #  name: Current MSRV is 1.65.0
-  #  runs-on: ubuntu-latest
-  #  steps:
-  #  - uses: actions/checkout@v3
-  #  # First run `cargo +nightly -Z minimal-verisons check` in order to get a
-  #  # Cargo.lock with the oldest possible deps
-  #  - uses: dtolnay/rust-toolchain@nightly
-  #  - run: cargo -Z minimal-versions check --all-features
-  #  # Now check that `cargo build` works with respect to the oldest possible
-  #  # deps and the stated MSRV
-  #  - uses: dtolnay/rust-toolchain@1.65.0
-  #  - run: cargo build --all-features
+  msrv:
+   name: Current MSRV is 1.63.0
+   runs-on: ubuntu-latest
+   steps:
+   - uses: actions/checkout@v3
+   # First run `cargo +nightly -Z minimal-verisons check` in order to get a
+   # Cargo.lock with the oldest possible deps
+   - uses: dtolnay/rust-toolchain@nightly
+   - run: cargo -Z minimal-versions check --all-features
+   # Now check that `cargo build` works with respect to the oldest possible
+   # deps and the stated MSRV
+   - uses: dtolnay/rust-toolchain@1.63.0
+   - run: cargo build --all-features
 
   clippy:
     runs-on: ubuntu-latest
diff --git a/README.md b/README.md
index 43ebf29..f10b285 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,14 @@ The `serde_impls` feature was removed. If you were using this and require backwa
 MSRV
 ----
 
-The current minimum supported Rust version (MSRV) is 1.65.0 (897e37553 2022-11-02).
+The current minimum supported Rust version (MSRV) is 1.63.0.
+
+To build and test with the MSRV you will need to pin the below dependency versions:
+
+```
+cargo update -p half --precise 2.2.1
+cargo update -p regex --precise 1.9.6
+```
 
 Changelog
 ---------