diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 76af4fd..afab817 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,7 +14,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: "1.56.0"
+          toolchain: "1.57.0"
 
       - name: version info
         run: rustc --version; cargo --version;
@@ -30,7 +30,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: "1.56.0"
+          toolchain: "1.57.0"
 
       - run: cargo fmt --all -- --check
 
@@ -42,7 +42,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: "1.56.0"
+          toolchain: "1.57.0"
 
       - run: cargo clippy --features=macro -- -D warnings
 
diff --git a/README.md b/README.md
index ed8859a..95b8815 100644
--- a/README.md
+++ b/README.md
@@ -88,7 +88,7 @@ around comments in expanded mode or error messages.
 
 ## Versioning
 
-The minimum supported rust version (MSRV) of `grass` is `1.56.0`. An increase to the MSRV will correspond with a minor version bump. The current MSRV is not a hard minimum, but future bugfix
+The minimum supported rust version (MSRV) of `grass` is `1.57.0`. An increase to the MSRV will correspond with a minor version bump. The current MSRV is not a hard minimum, but future bugfix
 versions of `grass` are not guaranteed to work on versions prior to this.
 
 `grass` currently targets `dart-sass` version `1.54.3`. An increase to this number will correspond to either a minor or bugfix version bump, depending on the changes.