diff --git a/package.json b/package.json
index cd95a35..ab6e544 100644
--- a/package.json
+++ b/package.json
@@ -95,11 +95,13 @@
     "e-33": "npm run exercise -- 33",
     "s-33": "npm run solution -- 33",
     "e-34": "npm run exercise -- 34",
-    "s-34": "npm run solution -- 34"
+    "s-34": "npm run solution -- 34",
+    "e-29.2": "npm run exercise -- 29.2",
+    "s-29.2": "npm run solution -- 29.2"
   },
   "dependencies": {
     "cross-env": "^7.0.3",
     "fast-glob": "^3.2.12",
     "ts-toolbelt": "^9.6.0"
   }
-}
+}
\ No newline at end of file
diff --git a/src/04-generics-advanced/19-generic-interfaces-with-functions.solution.ts b/src/04-generics-advanced/19-generic-interfaces-with-functions.solution.ts
index 8c4e126..b968c22 100644
--- a/src/04-generics-advanced/19-generic-interfaces-with-functions.solution.ts
+++ b/src/04-generics-advanced/19-generic-interfaces-with-functions.solution.ts
@@ -17,7 +17,7 @@ const createCache = <T>(initialCache?: Record<string, T>): Cache<T> => {
       cache[key] = value;
     },
     clone: (transform) => {
-      const newCache: Record<string, any> = {};
+      const newCache: Record<string, ReturnType<typeof transform>> = {};
 
       for (const key in cache) {
         newCache[key] = transform(cache[key]);