diff --git a/@sammo/game_logic/package.json b/@sammo/game_logic/package.json
index b3d50ee..31f9f22 100644
--- a/@sammo/game_logic/package.json
+++ b/@sammo/game_logic/package.json
@@ -15,6 +15,7 @@
     "@sammo/server_util": "workspace:^",
     "@sammo/util": "workspace:^",
     "@strpc/express": "workspace:^",
+    "date-fns": "^3.3.1",
     "dotenv": "^16.4.5",
     "mongoose": "^8.2.1"
   },
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 5b95da7..0283637 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -221,6 +221,9 @@ importers:
       '@strpc/express':
         specifier: workspace:^
         version: link:../../@strpc/express
+      date-fns:
+        specifier: ^3.3.1
+        version: 3.3.1
       dotenv:
         specifier: ^16.4.5
         version: 16.4.5