diff --git a/.github/functional_tests/test_helpers/verify_action_output.sh b/.github/functional_tests/test_helpers/verify_action_output.sh
index e9514a8..5b0c77a 100755
--- a/.github/functional_tests/test_helpers/verify_action_output.sh
+++ b/.github/functional_tests/test_helpers/verify_action_output.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Expects the following environment variables to be set in the calling job step:
 # - OUTPUT_NAME: the name of the output to verify
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2e195b..29f432e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Fixed
+
+- use a more portable shebang, useful for self-hosted runners
+
 ## v1.5.0 - 2026-04-21
 
 ### Added
diff --git a/scripts/check_reservoir_eligibility.sh b/scripts/check_reservoir_eligibility.sh
index a3dadd4..2b91c16 100755
--- a/scripts/check_reservoir_eligibility.sh
+++ b/scripts/check_reservoir_eligibility.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Group logging using the ::group:: workflow command
 echo "::group::Reservoir Eligibility Check Output"
diff --git a/scripts/config.sh b/scripts/config.sh
index 6bc0aca..e37e913 100755
--- a/scripts/config.sh
+++ b/scripts/config.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 # start log group
diff --git a/scripts/detect_mathlib.sh b/scripts/detect_mathlib.sh
index 1a1d2c0..5c10098 100755
--- a/scripts/detect_mathlib.sh
+++ b/scripts/detect_mathlib.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Group logging using the ::group:: workflow command
 echo "::group::Detect Mathlib Output"
diff --git a/scripts/install_elan.sh b/scripts/install_elan.sh
index 482d716..ad678c4 100755
--- a/scripts/install_elan.sh
+++ b/scripts/install_elan.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 # Group logging using the ::group:: workflow command
diff --git a/scripts/lake_build.sh b/scripts/lake_build.sh
index 6d5501a..dc0bbb7 100755
--- a/scripts/lake_build.sh
+++ b/scripts/lake_build.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 # start log group
diff --git a/scripts/lake_lint.sh b/scripts/lake_lint.sh
index c8075f9..87d7f8f 100755
--- a/scripts/lake_lint.sh
+++ b/scripts/lake_lint.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 echo "::group::Lake Lint Output"
diff --git a/scripts/lake_test.sh b/scripts/lake_test.sh
index 692ef28..bbf3744 100755
--- a/scripts/lake_test.sh
+++ b/scripts/lake_test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 # start log group
diff --git a/scripts/mk_all_check.sh b/scripts/mk_all_check.sh
index ab7da35..d5e0526 100755
--- a/scripts/mk_all_check.sh
+++ b/scripts/mk_all_check.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 echo "::group::mk_all Output"
diff --git a/scripts/run_leanchecker.sh b/scripts/run_leanchecker.sh
index 04006f6..3746b2d 100755
--- a/scripts/run_leanchecker.sh
+++ b/scripts/run_leanchecker.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -euo pipefail
 
 echo "::group::leanchecker Output"
diff --git a/scripts/run_nanoda.sh b/scripts/run_nanoda.sh
index ca87f03..6675345 100755
--- a/scripts/run_nanoda.sh
+++ b/scripts/run_nanoda.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 # Group logging using the ::group:: workflow command
diff --git a/scripts/set_output_parameters.sh b/scripts/set_output_parameters.sh
index 18a9a7e..629473b 100755
--- a/scripts/set_output_parameters.sh
+++ b/scripts/set_output_parameters.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Group logging using the ::group:: workflow command
 echo "::group::Set Output Parameters"