diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index 636e005..43df248 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -22,9 +22,6 @@ jobs:
       - name: Checkout source code
         uses: actions/checkout@v3
 
-      - name: Install Rust toolchain
-        uses: Cardinal-Cryptography/github-actions/install-rust-toolchain@v1
-
       - name: Run cargo fmt
         uses: actions-rs/cargo@v1
         with:
@@ -55,10 +52,7 @@ jobs:
         uses: actions/cache@v3
         with:
           path: ~/.cargo
-          key: ${{ runner.os }}-contract-build-env-${{ hashFiles('rust-toolchain.toml') }}
-
-      - name: Install Rust toolchain
-        uses: Cardinal-Cryptography/github-actions/install-rust-toolchain@v1
+          key: ${{ runner.os }}-contract-build-env
 
       - name: Install cargo contract
         uses: actions-rs/cargo@v1
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
deleted file mode 100644
index 91e2cd5..0000000
--- a/rust-toolchain.toml
+++ /dev/null
@@ -1,5 +0,0 @@
-[toolchain]
-channel = "1.72.1"
-components = ["rustfmt", "rust-src", "clippy"]
-targets = ["wasm32-unknown-unknown"]
-profile = "minimal"