diff --git a/.github/workflows/boj-build.yml b/.github/workflows/boj-build.yml
index ddeab5d0..ee425466 100644
--- a/.github/workflows/boj-build.yml
+++ b/.github/workflows/boj-build.yml
@@ -4,9 +4,13 @@ on:
   push:
     branches: [main, master]
   workflow_dispatch:
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 jobs:
   trigger-boj:
     runs-on: ubuntu-latest
+    timeout-minutes: 5
     steps:
       - name: Checkout
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
diff --git a/.github/workflows/instant-sync.yml b/.github/workflows/instant-sync.yml
index 98a72733..bb214d5e 100644
--- a/.github/workflows/instant-sync.yml
+++ b/.github/workflows/instant-sync.yml
@@ -11,9 +11,14 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   dispatch:
     runs-on: ubuntu-latest
+    timeout-minutes: 5
     steps:
       - name: Trigger Propagation
         uses: peter-evans/repository-dispatch@28959ce8df70de7be546dd1250a005dd32156697 # v3
diff --git a/.github/workflows/rust-ci.yml b/.github/workflows/rust-ci.yml
index 7acccac4..33c5d502 100644
--- a/.github/workflows/rust-ci.yml
+++ b/.github/workflows/rust-ci.yml
@@ -12,6 +12,10 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   rust-ci:
     uses: hyperpolymath/standards/.github/workflows/rust-ci-reusable.yml@cc5a372af1af1b202c17f1b21efd954e6c038bef
@@ -19,6 +23,7 @@ jobs:
   no-default-features:
     name: Cargo build + test (ephapax-cli, --no-default-features)
     runs-on: ubuntu-latest
+    timeout-minutes: 20
     if: hashFiles('Cargo.toml') != ''
 
     # Proves ephapax can be built and tested with zero git dep on the