diff --git a/Source/PubnubLibrary/Private/FunctionLibraries/PubnubUtilities.cpp b/Source/PubnubLibrary/Private/FunctionLibraries/PubnubUtilities.cpp
index ba22a96..19625ad 100644
--- a/Source/PubnubLibrary/Private/FunctionLibraries/PubnubUtilities.cpp
+++ b/Source/PubnubLibrary/Private/FunctionLibraries/PubnubUtilities.cpp
@@ -2,6 +2,7 @@
 
 
 #include "FunctionLibraries/PubnubUtilities.h"
+#include "Runtime/Launch/Resources/Version.h"
 #include "Json.h"
 
 
@@ -22,5 +23,10 @@ FString UPubnubUtilities::PubnubCharMemBlockToString(const pubnub_char_mem_block
 		return "";
 	}
 
+#if ENGINE_MINOR_VERSION <= 3
+	//This constructor is deprecated since 5.4
+	return FString(PnChar.size, PnChar.ptr);
+#else
 	return FString::ConstructFromPtrSize(PnChar.ptr, PnChar.size);
+#endif
 }
\ No newline at end of file
diff --git a/Source/ThirdParty/sdk/lib/arm64/libpubnub.a b/Source/ThirdParty/sdk/lib/arm64/libpubnub.a
index cf59190..40fdfc5 100644
Binary files a/Source/ThirdParty/sdk/lib/arm64/libpubnub.a and b/Source/ThirdParty/sdk/lib/arm64/libpubnub.a differ