diff --git a/.gitignore b/.gitignore
index 631e3651d9..1962b96e6b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@ analyzer-target
 *.code-workspace
 /setup
 testing/integration/perflogs*
+/.history/
\ No newline at end of file
diff --git a/mining/src/model/topological_index.rs b/mining/src/model/topological_index.rs
index 82c29d755f..b21cde76f9 100644
--- a/mining/src/model/topological_index.rs
+++ b/mining/src/model/topological_index.rs
@@ -113,8 +113,8 @@ where
         sorted.reverse();
         Ok(sorted)
     }
-
-    fn check_topological_order(&'a self, sorted: &Vec<TKey>) -> TopologicalIndexResult<()> {
+    #[allow(clippy::ptr_arg)]
+    fn check_topological_order(&'a self, sorted: &[TKey]) -> TopologicalIndexResult<()> {
         let nodes = self.topology_nodes().collect::<HashSet<_>>();
         if sorted.len() != nodes.len() {
             return Err(TopologicalIndexError::IndexHasWrongKeySet);
diff --git a/security.md b/security.md
new file mode 100644
index 0000000000..3530e7bbf2
--- /dev/null
+++ b/security.md
@@ -0,0 +1,21 @@
+# Security Policy
+
+## Supported Versions
+
+Use this section to tell people about which versions of your project are
+currently being supported with security updates.
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 5.1.x   | :white_check_mark: |
+| 5.0.x   | :x:                |
+| 4.0.x   | :white_check_mark: |
+| < 4.0   | :x:                |
+
+## Reporting a Vulnerability
+
+Use this section to tell people how to report a vulnerability.
+
+Tell them where to go, how often they can expect to get an update on a
+reported vulnerability, what to expect if the vulnerability is accepted or
+declined, etc.
\ No newline at end of file