diff --git a/src/script/webgraph_ranking/graph_explore_build_vertex_map.sh b/src/script/webgraph_ranking/graph_explore_build_vertex_map.sh
index c490b23..c38e358 100755
--- a/src/script/webgraph_ranking/graph_explore_build_vertex_map.sh
+++ b/src/script/webgraph_ranking/graph_explore_build_vertex_map.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Build node indexes to interactively explore a Common Crawl webgraph.
 # The webgraph files are expected to be placed in the current directory.
diff --git a/src/script/webgraph_ranking/graph_explore_download_webgraph.sh b/src/script/webgraph_ranking/graph_explore_download_webgraph.sh
index 83aeb2a..abf192b 100755
--- a/src/script/webgraph_ranking/graph_explore_download_webgraph.sh
+++ b/src/script/webgraph_ranking/graph_explore_download_webgraph.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 NAME="$1"
 if ! shift 1; then