diff --git a/src/api/code_scannings.rs b/src/api/code_scannings.rs
index b390eee5..c606a03d 100644
--- a/src/api/code_scannings.rs
+++ b/src/api/code_scannings.rs
@@ -2,6 +2,7 @@
 use crate::{models, params, Octocrab, Result};
 
 mod list;
+mod update;
 
 /// Handler for GitHub's code scanning API.
 ///
@@ -40,4 +41,25 @@ impl<'octo> CodeScanningHandler<'octo> {
     pub fn list(&self) -> list::ListCodeScanningsBuilder<'_, '_> {
         list::ListCodeScanningsBuilder::new(self)
     }
+
+    /// Update a code scanning alert
+    /// ```no_run
+    /// # use octocrab::params;
+    ///
+    ///  async fn run() -> octocrab::Result<()> {
+    /// # let octocrab = octocrab::Octocrab::default();
+    /// use octocrab::models;
+    ///
+    /// let issue = octocrab.code_scannings("owner", "repo")
+    ///     .update(1234u64)
+    ///     .state(params::AlertState::Dismissed)
+    ///     // Send the request
+    ///     .send()
+    ///     .await?;
+    /// # Ok(())
+    /// # }
+    /// ```
+    pub fn update(&self, number: u64) -> update::UpdateCodeScanningBuilder<'_, '_> {
+        update::UpdateCodeScanningBuilder::new(self, number)
+    }
 }
diff --git a/src/api/code_scannings/update.rs b/src/api/code_scannings/update.rs
new file mode 100644
index 00000000..aab4f256
--- /dev/null
+++ b/src/api/code_scannings/update.rs
@@ -0,0 +1,54 @@
+use super::*;
+
+#[derive(serde::Serialize)]
+pub struct UpdateCodeScanningBuilder<'octo, 'a> {
+    #[serde(skip)]
+    handler: &'a CodeScanningHandler<'octo>,
+    #[serde(skip)]
+    number: u64,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    state: Option<params::AlertState>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    dismissed_reason: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    dismissed_comment: Option<String>,
+}
+
+impl<'octo, 'a, 'b, 'c> UpdateCodeScanningBuilder<'octo, 'a> {
+    pub(crate) fn new(handler: &'a CodeScanningHandler<'octo>, number: u64) -> Self {
+        Self {
+            handler,
+            number,
+            state: None,
+            dismissed_reason: None,
+            dismissed_comment: None,
+        }
+    }
+
+    /// The title of the code scanning.
+    pub fn state(mut self, state: impl Into<params::AlertState>) -> Self {
+        self.state = Some(state.into());
+        self
+    }
+
+    pub fn dismissed_reason(mut self, dismissed_reason: impl Into<String>) -> Self {
+        self.dismissed_reason = Some(dismissed_reason.into());
+        self
+    }
+
+    pub fn dismissed_comment(mut self, dismissed_comment: impl Into<String>) -> Self {
+        self.dismissed_comment = Some(dismissed_comment.into());
+        self
+    }
+
+    pub async fn send(self) -> Result<models::code_scannings::CodeScanningAlert> {
+        let route = format!(
+            "/repos/{owner}/{repo}/code-scanning/alerts/{code_scanning}",
+            owner = self.handler.owner,
+            repo = self.handler.repo.as_ref().expect("Repository is required"),
+            code_scanning = self.number,
+        );
+
+        self.handler.crab.patch(route, Some(&self)).await
+    }
+}
diff --git a/src/params.rs b/src/params.rs
index 06096610..b4538775 100644
--- a/src/params.rs
+++ b/src/params.rs
@@ -1,5 +1,14 @@
 //! # Common GitHub Parameter Types
 
+/// The status of a issue or pull request.
+#[derive(Debug, Clone, Copy, serde::Serialize)]
+#[serde(rename_all = "lowercase")]
+#[non_exhaustive]
+pub enum AlertState {
+    Dismissed,
+    Open,
+}
+
 /// The status of a issue or pull request.
 #[derive(Debug, Clone, Copy, serde::Serialize)]
 #[serde(rename_all = "lowercase")]
diff --git a/tests/code_scanning_alert_update_test.rs b/tests/code_scanning_alert_update_test.rs
new file mode 100644
index 00000000..a7152c04
--- /dev/null
+++ b/tests/code_scanning_alert_update_test.rs
@@ -0,0 +1,65 @@
+use wiremock::{
+    matchers::{method, path},
+    Mock, MockServer, ResponseTemplate,
+};
+
+use mock_error::setup_error_handler;
+use octocrab::models::code_scannings::CodeScanningAlert;
+use octocrab::params::AlertState;
+use octocrab::Octocrab;
+
+mod mock_error;
+
+async fn setup_issue_check_assignee_api(template: ResponseTemplate) -> MockServer {
+    let owner: &str = "org";
+    let repo: &str = "some-repo";
+    let number: &str = "1";
+
+    let mock_server = MockServer::start().await;
+
+    Mock::given(method("PATCH"))
+        .and(path(format!(
+            "/repos/{owner}/{repo}/code-scanning/alerts/{number}",
+            owner = owner,
+            repo = repo
+        )))
+        .respond_with(template.clone())
+        .mount(&mock_server)
+        .await;
+
+    setup_error_handler(
+        &mock_server,
+        &format!("GET on /repos/{owner}/{repo}/code-scanning/alerts was not received"),
+    )
+    .await;
+    mock_server
+}
+
+fn setup_octocrab(uri: &str) -> Octocrab {
+    Octocrab::builder().base_uri(uri).unwrap().build().unwrap()
+}
+
+const OWNER: &str = "org";
+const REPO: &str = "some-repo";
+
+#[tokio::test]
+async fn check_patch_200() {
+    let s = include_str!("resources/codescanning_alert_single.json");
+    let alert: CodeScanningAlert = serde_json::from_str(s).unwrap();
+    let template = ResponseTemplate::new(200).set_body_json(&alert);
+    let mock_server = setup_issue_check_assignee_api(template).await;
+    let client = setup_octocrab(&mock_server.uri());
+
+    let result = client
+        .code_scannings(OWNER.to_owned(), REPO.to_owned())
+        .update(1)
+        .state(AlertState::Open)
+        .send()
+        .await;
+
+    assert!(
+        result.is_ok(),
+        "expected successful result, got error: {:#?}",
+        result
+    );
+}