diff --git a/src/Definitions.h b/src/Definitions.h
index ac318ab..c3cb36b 100644
--- a/src/Definitions.h
+++ b/src/Definitions.h
@@ -7,6 +7,10 @@
 #define tsclientmusic std::shared_ptr<ts::server::MusicClient>
 
 namespace ts {
+    constexpr static auto kMaxPokeMessageLength = 100;
+    constexpr static auto kMaxRequestTalkPowerMessageLength = 50;
+    constexpr static auto kMaxAfkMessageLength = 256;
+
     typedef uint16_t ServerId;
     typedef int32_t OptionalServerId;
     constexpr auto EmptyServerId = (OptionalServerId) -1;