diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c617ca8..468a2b8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         nim:
-          - '2.2.4'
+          - '2.0.14'
         os:
           - ubuntu-latest
           - windows-latest
@@ -26,11 +26,11 @@ jobs:
         run: |
           rustup set default-host x86_64-pc-windows-gnu
           rustup update stable
-          rustup default stable
+          rustup default 1.85.0
 
       - name: Set rust ${{ matrix.os }}
         if: matrix.os != 'windows-latest'
-        run: rustup update stable && rustup default stable
+        run: rustup update stable && rustup default 1.85.0
 
       - name: Setup nim
         uses: jiro4989/setup-nim-action@v1