diff --git a/src/package-lock.json b/src/package-lock.json
index 0542792..c5934a1 100644
--- a/src/package-lock.json
+++ b/src/package-lock.json
@@ -18,6 +18,10 @@
         "react-router-dom": "^6.26.2",
         "react-scripts": "5.0.1",
         "web-vitals": "^2.1.4"
+      },
+      "devDependencies": {
+        "nth-check": "^2.1.1",
+        "postcss": "^8.4.47"
       }
     },
     "node_modules/@adobe/css-tools": {
diff --git a/src/package.json b/src/package.json
index dd432b7..215a0ff 100644
--- a/src/package.json
+++ b/src/package.json
@@ -37,5 +37,9 @@
       "last 1 firefox version",
       "last 1 safari version"
     ]
+  },
+  "devDependencies": {
+    "nth-check": "^2.1.1",
+    "postcss": "^8.4.47"
   }
 }