diff --git a/.github/workflows/check.yaml b/.github/workflows/check.yaml
index 4889da4..6f59b6e 100644
--- a/.github/workflows/check.yaml
+++ b/.github/workflows/check.yaml
@@ -20,7 +20,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: 1.79.0
+          toolchain: 1.76.0
           components: rustfmt, clippy
           override: true
       - name: Check ✅
diff --git a/Earthfile b/Earthfile
index 20b52c5..3583c9e 100644
--- a/Earthfile
+++ b/Earthfile
@@ -17,7 +17,7 @@ docker:
   SAVE IMAGE --push fuwn/september:$tag
 
 deps:
-  ARG rustc="1.73.0"
+  ARG rustc="1.76.0"
 
   FROM clux/muslrust:$rustc