diff --git a/dist/index.js b/dist/index.js
index 9edb829..f208492 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -9874,7 +9874,7 @@ async function main() {
   await maybeInstallRebar3(rebar3Spec)
 
   // undefined is replaced by a function, post- main branch merge
-  const setupBeamVersion = 'undefined'
+  const setupBeamVersion = 'bc84950'
   core.setOutput('setup-beam-version', setupBeamVersion)
 }
 
diff --git a/src/setup-beam.js b/src/setup-beam.js
index 6d992f0..15c95fc 100644
--- a/src/setup-beam.js
+++ b/src/setup-beam.js
@@ -49,7 +49,7 @@ async function main() {
   await maybeInstallRebar3(rebar3Spec)
 
   // undefined is replaced by a function, post- main branch merge
-  const setupBeamVersion = 'undefined'
+  const setupBeamVersion = 'bc84950'
   core.setOutput('setup-beam-version', setupBeamVersion)
 }