diff --git a/.github/workflows/cargo_audit.yml b/.github/workflows/cargo_audit.yml
index 1a1be78b695e0adc594f0de23e055b4c0b973114..b3f989720edaf9e8ac614b3982d435adea955823 100644
--- a/.github/workflows/cargo_audit.yml
+++ b/.github/workflows/cargo_audit.yml
@@ -12,9 +12,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
           target: thumbv7em-none-eabi
-          override: true
       - uses: actions/setup-python@v1
         with:
           python-version: 3.7
diff --git a/.github/workflows/cargo_check.yml b/.github/workflows/cargo_check.yml
index 9697b373bb24d8e85e1a3ea745d5baa3fa6cce32..36110a9217bc95aa107ccd7d78c10e4c49ef7cd9 100644
--- a/.github/workflows/cargo_check.yml
+++ b/.github/workflows/cargo_check.yml
@@ -19,9 +19,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
           target: thumbv7em-none-eabi
-          override: true
       - uses: actions/setup-python@v1
         with:
           python-version: 3.7
diff --git a/.github/workflows/cargo_fmt.yml b/.github/workflows/cargo_fmt.yml
index 324b4755c7fbd5975bb7e8eea2684fe3c75eea5d..00589ca0dcc175c0533eb8d6a7d1dd5538838b05 100644
--- a/.github/workflows/cargo_fmt.yml
+++ b/.github/workflows/cargo_fmt.yml
@@ -19,9 +19,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
           target: thumbv7em-none-eabi
-          override: true
       - uses: actions/setup-python@v1
         with:
           python-version: 3.7
diff --git a/.github/workflows/cbor_test.yml b/.github/workflows/cbor_test.yml
index 5f38f5749ee92d441b04200d1b79fd6577260936..e1c73aad8a7a54adced850ae98d78ecd87039d08 100644
--- a/.github/workflows/cbor_test.yml
+++ b/.github/workflows/cbor_test.yml
@@ -14,9 +14,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
           target: thumbv7em-none-eabi
-          override: true
       - uses: actions/setup-python@v1
         with:
           python-version: 3.7
diff --git a/.github/workflows/crypto_test.yml b/.github/workflows/crypto_test.yml
index d8a2208b10159f188005d09575ea5faaf83b07ab..d79fd1f4adc3978d2293bdf994a11326dbc2b260 100644
--- a/.github/workflows/crypto_test.yml
+++ b/.github/workflows/crypto_test.yml
@@ -14,9 +14,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
           target: thumbv7em-none-eabi
-          override: true
       - uses: actions/setup-python@v1
         with:
           python-version: 3.7
diff --git a/.github/workflows/opensk_build.yml b/.github/workflows/opensk_build.yml
index ac82c73c938f486ae0b0d10674bf1376f75cdd5b..407a6034615e535f509bbae8de172a4ebd15ecb4 100644
--- a/.github/workflows/opensk_build.yml
+++ b/.github/workflows/opensk_build.yml
@@ -12,9 +12,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
           target: thumbv7em-none-eabi
-          override: true
       - uses: actions/setup-python@v1
         with:
           python-version: 3.7
diff --git a/.github/workflows/opensk_test.yml b/.github/workflows/opensk_test.yml
index 77be4deef45e7e6020946b73af39d2317354822f..3e34ce5d691947825edc0aa9f942faad1e619be7 100644
--- a/.github/workflows/opensk_test.yml
+++ b/.github/workflows/opensk_test.yml
@@ -14,9 +14,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
           target: thumbv7em-none-eabi
-          override: true
       - uses: actions/setup-python@v1
         with:
           python-version: 3.7