diff --git a/src/rpc/server.ts b/src/rpc/server.ts
index 4d3515e..24d3a70 100644
--- a/src/rpc/server.ts
+++ b/src/rpc/server.ts
@@ -132,7 +132,7 @@ export class RPCServer {
 
     cachedRequest = this.getCachedRequest(request);
 
-    if (!cachedRequest && !isStream) {
+    if (!cachedRequest && !isStream && method.cacheable) {
       this.cacheRequest(request, result);
     }