diff --git a/package.json b/package.json
index ac983d43b..e7f22b86f 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,6 @@
     "@slack/types": "^2.20.0",
     "@slack/web-api": "^7.14.1",
     "axios": "^1.12.0",
-    "express": "^5.0.0",
     "path-to-regexp": "^8.1.0",
     "raw-body": "^3",
     "tsscmp": "^1.0.6"
@@ -74,6 +73,12 @@
     "typescript": "5.3.3"
   },
   "peerDependencies": {
-    "@types/express": "^5.0.0"
+    "@types/express": "^5.0.0",
+    "express": "^5.0.0"
+  },
+  "peerDependenciesMeta": {
+    "express": {
+      "optional": true
+    }
   }
 }