1 files changed, 5 insertions, 2 deletions

diff --git a/messages/header.go b/messages/header.go
index 6320c71..34b36d3 100644
--- a/messages/header.go
+++ b/messages/header.go
@@ -4,8 +4,8 @@ import (
         "fmt"
         "os"
 
-        "github.com/bisaxa/bitreader"
-        "github.com/bisaxa/demoparser/utils"
+        "github.com/pektezol/bitreader"
+        "github.com/pektezol/demoparser/utils"
 )
 
 func ParseHeader(file *os.File) {
@@ -22,5 +22,8 @@ func ParseHeader(file *os.File) {
         header.PlaybackTicks = int32(reader.TryReadInt32())
         header.PlaybackFrames = int32(reader.TryReadInt32())
         header.SignOnLength = int32(reader.TryReadInt32())
+        if header.DemoProtocol != 4 { // Old Engine == 2, 3 / New Engine == 4
+                panic("Only New Engine is supported.")
+        }
         fmt.Printf("%+v", header)
 }