diff --git a/.github/workflows/ci-post-merge.yml b/.github/workflows/ci-post-merge.yml
index d37b2c107..15fa4c98b 100644
--- a/.github/workflows/ci-post-merge.yml
+++ b/.github/workflows/ci-post-merge.yml
@@ -19,6 +19,10 @@ jobs:
     name: ${{ matrix.target.name }} / ${{ matrix.version }}
     runs-on: ${{ matrix.target.os }}
 
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+      cancel-in-progress: true
+
     env:
       CI: 1
       CARGO_INCREMENTAL: 0
@@ -95,6 +99,11 @@ jobs:
   ci_feature_powerset_check:
     name: Verify Feature Combinations
     runs-on: ubuntu-latest
+
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+      cancel-in-progress: true
+
     steps:
       - uses: actions/checkout@v2
 
@@ -156,6 +165,11 @@ jobs:
   nextest:
     name: nextest
     runs-on: ubuntu-latest
+
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+      cancel-in-progress: true
+
     steps:
       - uses: actions/checkout@v2
 
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f41aa972f..1d3d1c2c8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,6 +22,10 @@ jobs:
     name: ${{ matrix.target.name }} / ${{ matrix.version }}
     runs-on: ${{ matrix.target.os }}
 
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+      cancel-in-progress: true
+
     env:
       CI: 1
       CARGO_INCREMENTAL: 0
@@ -98,6 +102,11 @@ jobs:
   rustdoc:
     name: doc tests
     runs-on: ubuntu-latest
+
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+      cancel-in-progress: true
+
     steps:
       - uses: actions/checkout@v2