diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 84ffebac6..d8068713a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: stable
+          toolchain: 1.63
           override: true
           components: rustfmt, clippy
 
@@ -43,7 +43,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: stable
+          toolchain: 1.63
           override: true
           components: rustfmt, clippy