diff --git a/odoo_tools/cli/pending.py b/odoo_tools/cli/pending.py
index 7f41142..9549045 100644
--- a/odoo_tools/cli/pending.py
+++ b/odoo_tools/cli/pending.py
@@ -21,8 +21,9 @@ def cli():
     "-s",
     "--state",
     "state",
-    help="only list pull requests in the specified state (open, merged, closed)",
-)  # TODO list valid values
+    help="only list pull requests in the specified state",
+    type=click.Choice(["open", "merged", "closed"], case_sensitive=False),
+)
 @click.option(
     "-p",
     "--purge",
diff --git a/odoo_tools/utils/pending_merge.py b/odoo_tools/utils/pending_merge.py
index 150939e..a48fa6b 100644
--- a/odoo_tools/utils/pending_merge.py
+++ b/odoo_tools/utils/pending_merge.py
@@ -407,8 +407,13 @@ def show_prs(self, state=None, purge=None):
         ui.echo(f"Merge file: {self.merges_path}")
         all_prs = aggregator.collect_prs_info()
         if state is not None:
-            # filter only our state
-            all_prs = {k: v for k, v in all_prs.items() if k == state}
+            if state == "merged":
+                all_prs = {"closed": all_prs.get("closed", [])}
+                all_prs["closed"] = [
+                    pr for pr in all_prs["closed"] if pr.get("merged") == "merged"
+                ]
+            else:
+                all_prs = {k: v for k, v in all_prs.items() if k == state}
         for pr_state, prs in all_prs.items():
             ui.echo(f"State: {pr_state}")
             for i, pr_info in enumerate(prs, 1):