diff --git a/.github/workflows/nightly-system-ci.yml b/.github/workflows/nightly-system-ci.yml
index e5e7e339..834e19f7 100644
--- a/.github/workflows/nightly-system-ci.yml
+++ b/.github/workflows/nightly-system-ci.yml
@@ -2,6 +2,7 @@
 name: nightly-system-ci
 
 on:
+  workflow_dispatch:
   schedule:
     - cron: '0 5 * * *'
 
diff --git a/.github/workflows/nightly-ubuntu-ci.yml b/.github/workflows/nightly-ubuntu-ci.yml
index cfcad9c2..a2ef3138 100644
--- a/.github/workflows/nightly-ubuntu-ci.yml
+++ b/.github/workflows/nightly-ubuntu-ci.yml
@@ -2,6 +2,7 @@
 name: nightly-ubuntu-ci
 
 on:
+  workflow_dispatch:
   schedule:
     - cron: '0 5 * * *'
 
diff --git a/.github/workflows/nightly-windows-ci.yml b/.github/workflows/nightly-windows-ci.yml
index c9ff7f1c..a956d61b 100644
--- a/.github/workflows/nightly-windows-ci.yml
+++ b/.github/workflows/nightly-windows-ci.yml
@@ -2,6 +2,7 @@
 name: nightly-windows-ci
 
 on:
+  workflow_dispatch:
   schedule:
     - cron: '0 5 * * *'