diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 58844ba..4823d26 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -59,7 +59,7 @@ jobs:
     - uses: actions-rs/toolchain@v1
       with:
         profile: minimal
-        toolchain: 1.47.0
+        toolchain: 1.63.0
         override: true
     - name: Install Deps
       run: sudo apt-get install --no-install-recommends build-essential binutils-dev libunwind-dev libblocksruntime-dev liblzma-dev
diff --git a/Cargo.toml b/Cargo.toml
index 2fd3667..859d72c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,6 +2,7 @@
 name = "honggfuzz"
 version = "0.5.56"
 edition = "2021"
+rust-version = "1.63"
 authors = ["Paul Grandperrin <paul.grandperrin@gmail.com>"]
 license = "MIT/Apache-2.0/Unlicense/WTFPL"
 repository = "https://github.com/rust-fuzz/honggfuzz-rs"