diff --git a/.github/workflows/percy.yml b/.github/workflows/percy.yml
index 7673b61995..99373bade6 100644
--- a/.github/workflows/percy.yml
+++ b/.github/workflows/percy.yml
@@ -3,7 +3,7 @@ name: Percy Visual Tests
 on:
   schedule:
     - cron: "15 23 * * 2,4" # T,Th in the afternoon (UTC)
-  workflow_dispatch:
+  workflow_dispatch: null
 
 concurrency:
   group: percy-${{ github.head_ref || github.ref }}
diff --git a/.github/workflows/update-transitive-dependencies.yaml b/.github/workflows/update-transitive-dependencies.yaml
index 8a9d8ea31a..03f0b654b7 100644
--- a/.github/workflows/update-transitive-dependencies.yaml
+++ b/.github/workflows/update-transitive-dependencies.yaml
@@ -3,7 +3,7 @@ name: Update Transitive Dependencies
 on:
   schedule:
     - cron: "15 11 * * 0" # weekly, on Sunday morning (UTC)
-  workflow_dispatch:
+  workflow_dispatch: null
 
 jobs:
   update: