diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index a82b9ca..704dcb5 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -1,49 +1,60 @@
 name: release
 on:
-  repository_dispatch:
-    types: [release]
+  workflow_dispatch:
+    inputs:
+      version:
+        description: Version to release
+        required: false
+      skip_prepare:
+        description: Skip preparation step (assume a release branch is ready)
+        required: false
+        default: false
+      dry_run:
+        description: Do not actually cut the release
+        required: false
+        default: false
   schedule:
     # We want the release to be at 10 or 11am Pacific Time
     # We also make this an hour after all others such as Sentry,
     # Snuba, and Relay to make sure their releases finish.
     - cron:  '0 18 15 * *'
 jobs:
   release:
     runs-on: ubuntu-latest
     name: "Release a new version"
     steps:
         - id: calver
-          if: ${{ !github.event.client_payload.version }}
+          if: ${{ !github.event.inputs.version }}
           run: |
             DATE_PART=$(date +'%y.%-m')
-            PATCH_VERSION=0
+            declare -i PATCH_VERSION=0
             while curl -sf -o /dev/null "https://api.github.com/repos/$GITHUB_REPOSITORY/git/ref/tags/$DATE_PART.$PATCH_VERSION"; do
-              (( PATCH_VERSION++ ))
+              PATCH_VERSION+=1
             done
             echo "::set-output name=version::$DATE_PART.$PATCH_VERSION"
         - uses: actions/checkout@v2
         - uses: getsentry/craft@master
-          if: ${{ !github.event.client_payload.skip_prepare }}
+          if: ${{ !github.event.inputs.skip_prepare }}
           with:
             action: prepare
-            version: ${{ github.event.client_payload.version || steps.calver.outputs.version }}
+            version: ${{ github.event.inputs.version || steps.calver.outputs.version }}
           env:
-            DRY_RUN: ${{ github.event.client_payload.dry_run }}
+            DRY_RUN: ${{ github.event.inputs.dry_run }}
             GIT_COMMITTER_NAME: getsentry-bot
             GIT_AUTHOR_NAME: getsentry-bot
             EMAIL: bot@getsentry.com
         # Wait until the builds start. Craft should do this automatically
         # but it is broken now.
         # TODO: Remove this once getsentry/craft#111 is fixed
         - run: sleep 10
         - uses: getsentry/craft@master
           with:
             action: publish
-            version: ${{ github.event.client_payload.version || steps.calver.outputs.version }}
+            version: ${{ github.event.inputs.version || steps.calver.outputs.version }}
             keep_branch: '--keep-branch'
             no_merge: '--no-merge'
           env:
-            DRY_RUN: ${{ github.event.client_payload.dry_run }}
+            DRY_RUN: ${{ github.event.inputs.dry_run }}
             GIT_COMMITTER_NAME: getsentry-bot
             GIT_AUTHOR_NAME: getsentry-bot
             EMAIL: bot@getsentry.com