diff --git a/.github/workflows/repl.yml b/.github/workflows/repl.yml
index 38b84e921..c0a76fc37 100644
--- a/.github/workflows/repl.yml
+++ b/.github/workflows/repl.yml
@@ -16,7 +16,7 @@ jobs:
     - name: Install Rust
       uses: actions-rs/toolchain@v1
       with:
-        toolchain: 1.50.0
+        toolchain: 1.66.0
         override: true
 
     - name: build