diff --git a/.github/workflows/eclipse-ls-extensions-build.yml b/.github/workflows/eclipse-ls-extensions-build.yml
index 2b95ea112..aa26b1602 100644
--- a/.github/workflows/eclipse-ls-extensions-build.yml
+++ b/.github/workflows/eclipse-ls-extensions-build.yml
@@ -1,5 +1,6 @@
 name: Eclipse LS Extensions Snapshot Build
 
+concurrency: eclipse-ls-extensions
 # configure manual trigger
 #on:
 #  workflow_dispatch:
diff --git a/.github/workflows/snapshot-e427-eclipse-distro-build.yml b/.github/workflows/snapshot-e427-eclipse-distro-build.yml
index 0454e7916..746040ce0 100644
--- a/.github/workflows/snapshot-e427-eclipse-distro-build.yml
+++ b/.github/workflows/snapshot-e427-eclipse-distro-build.yml
@@ -1,5 +1,7 @@
 name: Snapshot - 4.27 Eclipse STS Distribution Build
 
+concurrency: e427
+
 #on:
 #  workflow_dispatch:
 on:
diff --git a/.github/workflows/snapshot-e428-eclipse-distro-build.yml b/.github/workflows/snapshot-e428-eclipse-distro-build.yml
index f13faf3cc..fa954910c 100644
--- a/.github/workflows/snapshot-e428-eclipse-distro-build.yml
+++ b/.github/workflows/snapshot-e428-eclipse-distro-build.yml
@@ -1,5 +1,7 @@
 name: Snapshot - 4.28 Eclipse STS Distribution Build
 
+concurrency: e428
+
 #on:
 #  workflow_dispatch:
 on:
diff --git a/.github/workflows/snapshot-e429-eclipse-distro-build.yml b/.github/workflows/snapshot-e429-eclipse-distro-build.yml
index 801dc5fc7..59d9cf93a 100644
--- a/.github/workflows/snapshot-e429-eclipse-distro-build.yml
+++ b/.github/workflows/snapshot-e429-eclipse-distro-build.yml
@@ -1,5 +1,7 @@
 name: Snapshot - 4.29 Eclipse STS Distribution Build
 
+concurrency: e429
+
 on:
   workflow_dispatch: