diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 654296c..0df6b41 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - uses: dtolnay/rust-toolchain@1.70.0
+    - uses: dtolnay/rust-toolchain@1.73.0
       with:
         components: rustfmt
     - name: Check formatting
diff --git a/Cargo.toml b/Cargo.toml
index 87d091f..1d8bda2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ readme = "README.md"
 repository = "https://github.com/evmar/n2"
 # https://github.com/evmar/n2/issues/74
 # Note: if we bump this, may need to bump .github/workflows/ci.yml version too.
-rust-version = "1.70.0"
+rust-version = "1.73.0"
 description = "a ninja compatible build system"
 
 [dependencies]