diff --git a/couch_rs/src/changes.rs b/couch_rs/src/changes.rs
index 173f0a1..d4fca63 100644
--- a/couch_rs/src/changes.rs
+++ b/couch_rs/src/changes.rs
@@ -112,7 +112,11 @@ impl Stream for ChangesStream {
                 ChangesStreamState::Idle => {
                     let mut params = self.params.clone();
                     if let Some(seq) = &self.last_seq {
-                        params.insert("since".to_string(), seq.to_string());
+                        let seq = match seq {
+                            serde_json::Value::String(seq) => seq.to_string(),
+                            _ => seq.to_string(),
+                        };
+                        params.insert("since".to_string(), seq);
                     }
                     let fut = get_changes(self.client.clone(), self.database.clone(), params);
                     ChangesStreamState::Requesting(Box::pin(fut))