diff --git a/CHANGES.md b/CHANGES.md
index d9f1d62..eb08a6a 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,12 +2,17 @@
 
 ## Added
 
+ * `Project.merge_requests`: add parameter `wip`
+ * `Project.merge_requests`: add parameter `target_branch`
+ * `Project.merge_requests`: add parameter `per_page`
  * `Gitlab` module now exposes `Message` exception
 
 ## Bug fixes
 
  * `gitlab.atd`: add `scheduler_failure` to `failure_reason`
  * `gitlab.atd`: add `data_integrity_failure` to `failure_reason`
+ * `gitlab.atd`: make `merge_request.approvals_before_merge` integral
+ * `gitlab.atd`: make `merge_request.sha` nullable
  * `gitlab.atd`: add failure reasons: `api_failure`,
    `missing_dependency_failure`, `runner_unsupported`,
    `stale_schedule`, `archived_failure`, `unmet_prerequisites`,
diff --git a/lib/gitlab.atd b/lib/gitlab.atd
index 125d1ad..c96171d 100644
--- a/lib/gitlab.atd
+++ b/lib/gitlab.atd
@@ -369,7 +369,7 @@ type merge_request = {
   downvotes: int;
   author: user_short;
   assignee: user_short nullable;
-  approvals_before_merge: string nullable;
+  approvals_before_merge: int nullable;
   ?allow_collaboration: bool nullable;
   ?allow_maintainer_to_push: bool nullable;
   blocking_discussions_resolved: bool;
@@ -384,7 +384,7 @@ type merge_request = {
   milestone: milestone nullable;
   merge_when_pipeline_succeeds: bool;
   merge_status: merge_status;
-  sha: string;
+  sha: string nullable;
   merge_commit_sha: string nullable;
   squash_commit_sha: string nullable;
   user_notes_count: int;
diff --git a/lib/gitlab_core.ml b/lib/gitlab_core.ml
index cc18f44..9d1813d 100644
--- a/lib/gitlab_core.ml
+++ b/lib/gitlab_core.ml
@@ -1309,11 +1309,24 @@ struct
     | None -> uri
     | Some sort -> Uri.add_query_param' uri ("sort", show sort)
 
+  let wip_param wip uri =
+    match wip with
+    | None -> uri
+    | Some wip ->
+        let wip = if wip then "yes" else "no" in
+        Uri.add_query_param' uri ("wip", wip)
+
   let event_scope_param scope uri =
     match scope with
     | None -> uri
     | Some scope -> Uri.add_query_param' uri ("scope", scope)
 
+  let target_branch_param target_branch uri =
+    match target_branch with
+    | None -> uri
+    | Some target_branch ->
+        Uri.add_query_param' uri ("target_branch", target_branch)
+
   module Event = struct
     open Lwt
 
@@ -1487,7 +1500,7 @@ struct
 
     let merge_requests ?token ?state ?milestone ?labels ?author ?author_username
         ?my_reaction ?scope ?created_after ?created_before ?updated_after
-        ?updated_before ?sort ?order_by ~id () =
+        ?updated_before ?sort ?order_by ?target_branch ?wip ?per_page ~id () =
       let order_by_param order uri =
         let show = function
           | `Created_at -> "created_at"
@@ -1510,6 +1523,8 @@ struct
         |> updated_after_param updated_after
         |> updated_before_param updated_before
         |> order_by_param order_by |> sort_param sort
+        |> target_branch_param target_branch
+        |> wip_param wip |> per_page_param per_page
       in
       API.get_stream ?token ~uri (fun body ->
           return (Gitlab_j.merge_requests_of_string body))
diff --git a/lib/gitlab_s.mli b/lib/gitlab_s.mli
index 59c902f..e8c11e4 100644
--- a/lib/gitlab_s.mli
+++ b/lib/gitlab_s.mli
@@ -695,6 +695,9 @@ module type Gitlab = sig
       ?updated_before:string ->
       ?sort:Gitlab_t.sort ->
       ?order_by:[ `Created_at | `Title | `Updated_at ] ->
+      ?target_branch:string ->
+      ?wip:bool ->
+      ?per_page:int ->
       id:int ->
       unit ->
       Gitlab_t.merge_request Stream.t