diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c687115389..ed88c77243 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -45,7 +45,6 @@ jobs:
           - x86_64-unknown-linux-gnu
         toolchain:
           - stable
-          - 1.36.0
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -79,10 +78,6 @@ jobs:
           target: ${{ matrix.target }}
           override: true
 
-      - name: Disable optimisation profiles
-        if: matrix.toolchain == '1.36.0'
-        run: sed -i '/^\[profile.*build-override]$/,/^$/{/^#/!{/^$/!d}}' Cargo.toml
-
       - name: cargo check
         uses: actions-rs/cargo@v1
         with:
@@ -306,7 +301,6 @@ jobs:
           - x86_64-unknown-linux-gnu
         toolchain:
           - stable
-          - 1.36.0
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -340,10 +334,6 @@ jobs:
           target: ${{ matrix.target }}
           override: true
 
-      - name: Disable optimisation profiles
-        if: matrix.toolchain == '1.36.0'
-        run: sed -i '/^\[profile.*build-override]$/,/^$/{/^#/!{/^$/!d}}' Cargo.toml
-
       - name: cargo check
         uses: actions-rs/cargo@v1
         with:
@@ -382,7 +372,7 @@ jobs:
       - name: Install Rust
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.36.0
+          toolchain: stable
           target: thumbv7m-none-eabi
           override: true
 
@@ -426,7 +416,7 @@ jobs:
       - name: Install Rust
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.36.0
+          toolchain: stable
           target: thumbv6m-none-eabi
           override: true