diff --git a/.github/workflows/master.yml b/.github/workflows/master.yml
index 2f666dc..14ee97e 100644
--- a/.github/workflows/master.yml
+++ b/.github/workflows/master.yml
@@ -37,7 +37,7 @@ jobs:
       uses: actions/cache@v1
       with:
         path: target
-        key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
+        key: ${{ runner.os }}-cargo-build-target-${{ matrix.toolchain }}-${{ matrix.target }}-${{ hashFiles('**/Cargo.lock') }}
     - uses: actions-rs/toolchain@v1
       with:
         toolchain: ${{ matrix.toolchain }}