diff --git a/action.yml b/action.yml
index 84d097fe..4d0281d7 100644
--- a/action.yml
+++ b/action.yml
@@ -54,12 +54,15 @@ inputs:
   check_artifacts:
     description: Check workflow run whether it has an artifact
     required: false
+    default: false
   search_artifacts:
     description: Search workflow runs for artifact with specified name
     required: false
+    default: false
   skip_unpack:
     description: Choose to skip unpacking the downloaded artifact(s)
     required: false
+    default: false
   dry_run:
     description: Check the existence of artifact(s) without downloading
     required: false
diff --git a/main.js b/main.js
index c9dcb8b4..18f5654f 100644
--- a/main.js
+++ b/main.js
@@ -25,7 +25,7 @@ async function main() {
         const [owner, repo] = core.getInput("repo", { required: true }).split("/")
         const path = core.getInput("path", { required: true })
         const name = core.getInput("name")
-        const skipUnpack = core.getInput("skip_unpack")
+        const skipUnpack = core.getBooleanInput("skip_unpack")
         const ifNoArtifactFound = core.getInput("if_no_artifact_found")
         let workflow = core.getInput("workflow")
         let workflowConclusion = core.getInput("workflow_conclusion")
@@ -35,8 +35,8 @@ async function main() {
         let event = core.getInput("event")
         let runID = core.getInput("run_id")
         let runNumber = core.getInput("run_number")
-        let checkArtifacts = core.getInput("check_artifacts")
-        let searchArtifacts = core.getInput("search_artifacts")
+        let checkArtifacts = core.getBooleanInput("check_artifacts")
+        let searchArtifacts = core.getBooleanInput("search_artifacts")
         let dryRun = core.getInput("dry_run")
 
         const client = github.getOctokit(token)