diff --git a/CHANGELOG.md b/CHANGELOG.md
index 18f7254..43d574d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- Don't print nextflow help output by default, only on debug mode (#173)
+
 ## [2.1.0] - 2024-12-04
 
 ### Changed
diff --git a/src/main.ts b/src/main.ts
index ff323b6..a34956f 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -76,7 +76,10 @@ async function run(): Promise<void> {
 
   // Run Nextflow so it downloads its dependencies
   try {
-    await exec.exec("nextflow", ["help"])
+    await exec.exec("nextflow", ["help"], {
+      // set silent to true if not in debug mode
+      silent: !core.isDebug()
+    })
   } catch (e: unknown) {
     if (e instanceof Error) {
       // fail workflow if Nextflow run does not succeed