diff --git a/action.yml b/action.yml
index f4f047d87..f0c2efa41 100644
--- a/action.yml
+++ b/action.yml
@@ -48,7 +48,7 @@ inputs:
   escape-paths:
     description: 'Escape special characters of filenames used in the `paths` output'
     required: false
-    default: false
+    default: "false"
   strip-top-level-dir:
     description: 'Strip the `$GITHUB_WORKSPACE` from the `paths` output'
     required: false
diff --git a/src/main.ts b/src/main.ts
index cfc625724..8a6adda8d 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -64,7 +64,8 @@ export async function run(): Promise<void> {
     required: true
   })
   const baseRef = core.getInput('base-ref', {required: false})
-  const headRepoFork = core.getBooleanInput('head-repo-fork', {required: false})
+  const headRepoFork =
+    core.getInput('head-repo-fork', {required: false}) === 'true'
   const sha = core.getInput('sha', {required: includeDeletedFiles})
   const baseSha = core.getInput('base-sha', {required: includeDeletedFiles})