diff --git a/warp-runner/src/executor.rs b/warp-runner/src/executor.rs
index 270b1b7..435f465 100644
--- a/warp-runner/src/executor.rs
+++ b/warp-runner/src/executor.rs
@@ -1,5 +1,11 @@
 use std::env;
 use std::io;
+#[cfg(target_family = "unix")]
+use std::fs;
+#[cfg(target_family = "unix")]
+use std::fs::Permissions;
+#[cfg(target_family = "unix")]
+use std::os::unix::fs::PermissionsExt;
 use std::path::Path;
 use std::process::Command;
 use std::process::Stdio;
@@ -13,8 +19,16 @@ pub fn execute(target: &Path) -> io::Result<i32> {
     do_execute(target, &args)
 }
 
+#[cfg(target_family = "unix")]
+fn ensure_executable(target: &Path) {
+    let perms = Permissions::from_mode(0o770);
+    fs::set_permissions(target, perms).unwrap();
+}
+
 #[cfg(target_family = "unix")]
 fn do_execute(target: &Path, args: &[String]) -> io::Result<i32> {
+    ensure_executable(target);
+
     Ok(Command::new(target)
         .args(args)
         .stdin(Stdio::inherit())