diff --git a/src/ha.h b/src/ha.h
index d89a6be..4f43010 100644
--- a/src/ha.h
+++ b/src/ha.h
@@ -186,14 +186,17 @@ namespace Ha {
     };
 
     struct State : Config {
-        char topic[TOPIC_SIZE] = {};
+        char* topic;
         const char* jsonAttributesTemplate = nullptr;
         const char* valueTemplate = nullptr;
 
-        State(Component* cmp) : cmp(cmp) {}
+        State(Component* cmp) : cmp(cmp) {
+            auto len = snprintf(nullptr, 0, BASE_TOPIC"/state", cmp->id);
+            topic = new char[len + 1];
+        }
 
         void withStateTopic() {
-            snprintf(topic, sizeof(topic),  BASE_TOPIC"/state", cmp->id);
+            sprintf(topic, BASE_TOPIC"/state", cmp->id);
         }
 
         void updateState(const char* message) {