diff --git a/.github/workflows/cosmwasm-basic.yml b/.github/workflows/cosmwasm-basic.yml
index 372dd8e1..01e5fea2 100644
--- a/.github/workflows/cosmwasm-basic.yml
+++ b/.github/workflows/cosmwasm-basic.yml
@@ -38,7 +38,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Install wasm32-unknown-unknown toolchain
-        uses: dtolnay/rust-toolchain@stable
+        uses: dtolnay/rust-toolchain@1.78.0
         with:
           target: wasm32-unknown-unknown
 
@@ -66,7 +66,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Install stable toolchain
-        uses: dtolnay/rust-toolchain@stable
+        uses: dtolnay/rust-toolchain@1.78.0
         with:
           target: wasm32-unknown-unknown
 
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index e159221a..e374478e 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -57,7 +57,6 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
           components: clippy
           override: true
       - uses: Swatinem/rust-cache@v1
@@ -78,7 +77,6 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
           override: true
       - uses: Swatinem/rust-cache@v1
       - uses: webfactory/ssh-agent@v0.9.0