diff --git a/proxy/handler.go b/proxy/handler.go
index 261a1c5..d9cd62a 100644
--- a/proxy/handler.go
+++ b/proxy/handler.go
@@ -109,12 +109,12 @@ func (h *ProxyHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
         return
     }
     
-    if entry := h.cache.Get(targetURL); entry != nil {
+    cacheKey := h.cache.GenerateKey(targetURL)
+    if entry := h.cache.Get(cacheKey); entry != nil {
         log.Printf("Cache HIT: %s", targetURL)
         h.serveCached(w, entry)
         return
     }
-    
     log.Printf("Cache MISS: %s", targetURL)
     
     proxyReq, err := http.NewRequest(r.Method, targetURL, r.Body)
@@ -163,7 +163,7 @@ func (h *ProxyHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
                 headers[key] = values[0]
             }
         }
-        h.cache.Set(targetURL, body, headers)
+        h.cache.Set(cacheKey, body, headers)
     }
     
     h.sendResponse(w, resp, body)