diff --git a/.github/workflows/build-test-windows.yml b/.github/workflows/build-test-windows.yml
index a3983eec3..a5625d353 100644
--- a/.github/workflows/build-test-windows.yml
+++ b/.github/workflows/build-test-windows.yml
@@ -13,7 +13,7 @@ jobs:
         platform:
           - windows2019 # custom runner
         toolchain:
-          - stable
+          - 1.52.1
     runs-on:                    ${{ matrix.platform }}
     steps:
       - name:                   Checkout sources
diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index 344591c0a..d59eb79fe 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -15,7 +15,7 @@ jobs:
           - ubuntu-16.04
           - macos-latest
         toolchain:
-          - stable
+          - 1.52.1
     runs-on:                    ${{ matrix.platform }}
     steps:
       - name:                   Checkout sources
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fae328913..9f2966075 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,7 +20,7 @@ jobs:
           - ubuntu-16.04
           - macos-latest
         toolchain:
-          - stable
+          - 1.52.1
     runs-on:                    ${{ matrix.platform }}
     steps:
       - name:                   Checkout sources
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 7c9b9c6e0..90c7f474c 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -15,10 +15,10 @@ jobs:
         uses:                   actions/checkout@main
         with:
           submodules:           true
-      - name:                   Install stable toolchain
+      - name:                   Install 1.52.1 toolchain
         uses:                   actions-rs/toolchain@v1
         with:
-          toolchain:            stable
+          toolchain:            1.52.1
           profile:              minimal
           override:             true
       - name:                   Run cargo check 1/3
diff --git a/.github/workflows/deploy-docker-nightly.yml b/.github/workflows/deploy-docker-nightly.yml
index b80691b15..a0eb3db7c 100644
--- a/.github/workflows/deploy-docker-nightly.yml
+++ b/.github/workflows/deploy-docker-nightly.yml
@@ -16,7 +16,7 @@ jobs:
       - name:                   Install toolchain
         uses:                   actions-rs/toolchain@v1
         with:
-          toolchain:            stable
+          toolchain:            1.52.1
           profile:              minimal
           override:             true
       - name:                   Deploy to docker hub
diff --git a/.github/workflows/deploy-docker-tag.yml b/.github/workflows/deploy-docker-tag.yml
index 84beb5dec..4114d5e71 100644
--- a/.github/workflows/deploy-docker-tag.yml
+++ b/.github/workflows/deploy-docker-tag.yml
@@ -17,7 +17,7 @@ jobs:
       - name:                   Install toolchain
         uses:                   actions-rs/toolchain@v1
         with:
-          toolchain:            stable
+          toolchain:            1.52.1
           profile:              minimal
           override:             true
       - name:                   Deploy to docker hub
diff --git a/.github/workflows/deploy-docker.yml b/.github/workflows/deploy-docker.yml
index 44c70a804..f179e7449 100644
--- a/.github/workflows/deploy-docker.yml
+++ b/.github/workflows/deploy-docker.yml
@@ -17,7 +17,7 @@ jobs:
       - name:                   Install toolchain
         uses:                   actions-rs/toolchain@v1
         with:
-          toolchain:            stable
+          toolchain:            1.52.1
           profile:              minimal
           override:             true
       - name:                   Deploy to docker hub
diff --git a/.github/workflows/fmt.yml b/.github/workflows/fmt.yml
index a22d8fce7..f6b8984ce 100644
--- a/.github/workflows/fmt.yml
+++ b/.github/workflows/fmt.yml
@@ -11,7 +11,7 @@ jobs:
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: stable
+          toolchain: 1.52.1
           override: true
       - run: rustup component add rustfmt
       - uses: actions-rs/cargo@v1