diff --git a/src/gamma/types/request.rs b/src/gamma/types/request.rs
index a6ea9db2..7a27a461 100644
--- a/src/gamma/types/request.rs
+++ b/src/gamma/types/request.rs
@@ -202,6 +202,7 @@ pub struct MarketsRequest {
     #[builder(default)]
     pub question_ids: Vec<B256>,
     pub include_tag: Option<bool>,
+    pub active: Option<bool>,
     pub closed: Option<bool>,
 }
 
diff --git a/tests/gamma.rs b/tests/gamma.rs
index 1ad2f69c..d4e2916f 100644
--- a/tests/gamma.rs
+++ b/tests/gamma.rs
@@ -1279,6 +1279,7 @@ mod query_string {
                 b256!("0x0000000000000000000000000000000000000000000000000000000000000002"),
             ])
             .include_tag(true)
+            .active(true)
             .closed(false)
             .build();
 
@@ -1323,6 +1324,7 @@ mod query_string {
             "question_ids=0x0000000000000000000000000000000000000000000000000000000000000002"
         ));
         assert!(qs.contains("include_tag=true"));
+        assert!(qs.contains("active=true"));
         assert!(qs.contains("closed=false"));
     }
 
@@ -1348,6 +1350,27 @@ mod query_string {
         assert!(!qs.contains("question_ids="));
     }
 
+    #[test]
+    fn markets_request_active_true() {
+        let request = MarketsRequest::builder().active(true).build();
+        let qs = request.query_params(None);
+        assert!(qs.contains("active=true"));
+    }
+
+    #[test]
+    fn markets_request_active_false() {
+        let request = MarketsRequest::builder().active(false).build();
+        let qs = request.query_params(None);
+        assert!(qs.contains("active=false"));
+    }
+
+    #[test]
+    fn markets_request_active_omitted_when_unset() {
+        let request = MarketsRequest::default();
+        let qs = request.query_params(None);
+        assert!(!qs.contains("active"));
+    }
+
     #[test]
     fn market_by_id_request_with_include_tag() {
         let request = MarketByIdRequest::builder()