diff --git a/aurweb/routers/packages.py b/aurweb/routers/packages.py
index 4426d0be..f806f054 100644
--- a/aurweb/routers/packages.py
+++ b/aurweb/routers/packages.py
@@ -30,7 +30,7 @@ from aurweb.models.request_type import DELETION_ID, RequestType
 from aurweb.models.user import User
 from aurweb.packages.search import PackageSearch
 from aurweb.packages.util import get_pkg_or_base, get_pkgbase_comment, query_notified, query_voted
-from aurweb.scripts import notify
+from aurweb.scripts import notify, popupdate
 from aurweb.scripts.rendercomment import update_comment_render
 from aurweb.templates import make_context, render_raw_template, render_template
 
@@ -858,6 +858,10 @@ async def pkgbase_vote(request: Request, name: str):
                       PackageBase=pkgbase,
                       VoteTS=now)
 
+        # Update NumVotes/Popularity.
+        conn = db.ConnectionExecutor(db.get_engine().raw_connection())
+        popupdate.run_single(conn, pkgbase)
+
     return RedirectResponse(f"/pkgbase/{name}",
                             status_code=int(HTTPStatus.SEE_OTHER))
 
@@ -875,6 +879,10 @@ async def pkgbase_unvote(request: Request, name: str):
         with db.begin():
             db.session.delete(vote)
 
+        # Update NumVotes/Popularity.
+        conn = db.ConnectionExecutor(db.get_engine().raw_connection())
+        popupdate.run_single(conn, pkgbase)
+
     return RedirectResponse(f"/pkgbase/{name}",
                             status_code=int(HTTPStatus.SEE_OTHER))
 
diff --git a/aurweb/scripts/popupdate.py b/aurweb/scripts/popupdate.py
index b1e70403..fa82208d 100755
--- a/aurweb/scripts/popupdate.py
+++ b/aurweb/scripts/popupdate.py
@@ -1,20 +1,47 @@
 #!/usr/bin/env python3
 
-import time
+from datetime import datetime
 
 import aurweb.db
 
 
+def run_single(conn, pkgbase):
+    """ A single popupdate. The given pkgbase instance will be
+    refreshed after the database update is done.
+
+    NOTE: This function is compatible only with aurweb FastAPI.
+
+    :param conn: db.Connection[Executor]
+    :param pkgbase: Instance of db.PackageBase
+    """
+
+    conn.execute("UPDATE PackageBases SET NumVotes = ("
+                 "SELECT COUNT(*) FROM PackageVotes "
+                 "WHERE PackageVotes.PackageBaseID = PackageBases.ID) "
+                 "WHERE PackageBases.ID = ?", [pkgbase.ID])
+
+    now = int(datetime.utcnow().timestamp())
+    conn.execute("UPDATE PackageBases SET Popularity = ("
+                 "SELECT COALESCE(SUM(POWER(0.98, (? - VoteTS) / 86400)), 0.0) "
+                 "FROM PackageVotes WHERE PackageVotes.PackageBaseID = "
+                 "PackageBases.ID AND NOT VoteTS IS NULL) WHERE "
+                 "PackageBases.ID = ?", [now, pkgbase.ID])
+
+    conn.commit()
+    conn.close()
+    aurweb.db.session.refresh(pkgbase)
+
+
 def main():
     conn = aurweb.db.Connection()
-    conn.execute("UPDATE PackageBases SET NumVotes = (" +
-                 "SELECT COUNT(*) FROM PackageVotes " +
+    conn.execute("UPDATE PackageBases SET NumVotes = ("
+                 "SELECT COUNT(*) FROM PackageVotes "
                  "WHERE PackageVotes.PackageBaseID = PackageBases.ID)")
 
-    now = int(time.time())
-    conn.execute("UPDATE PackageBases SET Popularity = (" +
-                 "SELECT COALESCE(SUM(POWER(0.98, (? - VoteTS) / 86400)), 0.0) " +
-                 "FROM PackageVotes WHERE PackageVotes.PackageBaseID = " +
+    now = int(datetime.utcnow().timestamp())
+    conn.execute("UPDATE PackageBases SET Popularity = ("
+                 "SELECT COALESCE(SUM(POWER(0.98, (? - VoteTS) / 86400)), 0.0) "
+                 "FROM PackageVotes WHERE PackageVotes.PackageBaseID = "
                  "PackageBases.ID AND NOT VoteTS IS NULL)", [now])
 
     conn.commit()
diff --git a/test/test_packages_routes.py b/test/test_packages_routes.py
index 1f258497..7b9c520c 100644
--- a/test/test_packages_routes.py
+++ b/test/test_packages_routes.py
@@ -1771,6 +1771,7 @@ def test_pkgbase_vote(client: TestClient, user: User, package: Package):
 
     vote = pkgbase.package_votes.filter(PackageVote.UsersID == user.ID).first()
     assert vote is not None
+    assert pkgbase.NumVotes == 1
 
     # Remove vote.
     endpoint = f"/pkgbase/{pkgbase.Name}/unvote"
@@ -1780,6 +1781,7 @@ def test_pkgbase_vote(client: TestClient, user: User, package: Package):
 
     vote = pkgbase.package_votes.filter(PackageVote.UsersID == user.ID).first()
     assert vote is None
+    assert pkgbase.NumVotes == 0
 
 
 def test_pkgbase_disown_as_tu(client: TestClient, tu_user: User,